This dissertation has two main objectives. The first one is to construct historical macroeconomic series for Sweden using a consistent method throughout the relevant periods, and which rely on modern methods of national accounting. The second objective is to investigate patterns of economic growth, accumulation and crisis in Sweden 1800-2000, based on the constructed data series. New annual data series of Gross Domestic Product and its division into activities (type of production) and expenditures (consumption, investment and foreign trade), Net Domestic Product, stocks of produced assets and consumption of fixed assets are constructed for the period 1800-2000; series of employment, wages, imputed labour income of self employed and surplus for the period 1850-2000; and series of worked hours for the period 1950-2000. Summary tables of the main aggregate variables are presented at the end of the dissertation. The intent is to make the data material available online (also at a more disaggregated level) at: http://www.historia.se. Although the present study criticises the somewhat deterministic vision of many long cycle theories, it also demonstrates that the concept of long cycle can be applied when studying long-term fluctuations in GDP per capita, provided that the notion of a fixed periodicity of long cycles is abandoned. Long-term economic fluctuations are irregular, but so is also the short-term business cycle. Different historical tendencies and trends are investigated. The decline of the relative size of industrial activities in the last half of 20th century was not as dramatic, if unpaid household labour is considered and that many services are industry-related. The Marxist theory of a Tendency for the Rate of Profit to Fall is partly confirmed as a secular process up to the 1970s, but profitability has rebounded in the last two decades of the 20th century. During the 1990s, the investment ratio declined to historically low levels and the volume value of the net stock of buildings and structures fell for the first time since the 1830s. A comparison is also made of depressions in Sweden since 1850. During the 19th century, depressions were largely induced by the agricultural sector, and during the 20th century by industrial activities. However, the transition to the modern business cycle was not sudden but rather protracted. Another finding is that the 1990s depression was somewhat deeper than the 1930s depression in terms of GDP contraction.

The experience of unemployment puts individuals at risk of long-term negative scarring and the longer the unemployment spell, the greater the risk of negative scarring. In Sweden, labour market policies aim at reducing such risks in the form of unemployment benefits, active matching and active labour market policy programmes (ALMPs). However, there is frequent discussion regarding the extent to which these kinds of policies actually reduce the risk of negative scarring. It is often argued that the programmes are of poor quality, particularly during economic downturns, and participants are often not motivated for the task. Likewise, it is claimed that unemployment insurance tends to counteract a quick return to the regular labour market. One problem related to labour market policies is that it has been difficult to examine the impact of such policies. Studies often present results that appear scattered due to differences in what is actually being measured and methodological problems. The uniqueness of this thesis is that it is based on a large-scale longitudinal register of data that has provided important empirical information regarding the long-term effects of labour market policy investments. The quality of data has also enabled the use of evaluation techniques which largely can help to reduce the uncertainty of the findings. More precisely, the research questions examine (1) in what way the level of unemployment benefit functions as protection against unemployment scarring, (2) in what way the ALMPs protect long-term unemployed people from long-term unemployment scarring, (3) at what point in a business cycle the ALMPs are efficient and finally, (4) for whom do the ALMPs function to reduce the risk of negative scarring. In this thesis, scarring effects are measured as the risk of labour market exit, the risk of labour market instability and the risk of future negative wage trajectories. The methods used in most studies are Cox regressions in combination with instrumental variable analysis (the Heckman two-step procedure). The empirical findings indicate that ALMPs worked well to reduce such negative effects both in times of booms (1999) and recessions (1993) and particularly among the youngest and oldest actors on the labour market. They also function particularly well for people with a low level of education. However, it is important not to exclude unemployed people who have a high level of education, in the belief that ALMPs have nothing to offer them, since such people are particularly helped by ALMPs as regards reducing the risk of future labour market instability. It was also found that generous unemployment benefit helped to reduce the risk of future negative wage scarring. In addition to these findings, some mechanisms were identified which proved to be important tools for transforming policies into valuable resources for the unemployed. In this thesis, the value of the findings of these mechanisms is discussed from the perspective of the capability approach. Even if the same investments were made in all unemployed persons, the participants would respond differently to the investment. Some reasons for the inequality in outcomes were found within the programmes and were due to heterogeneity in the unemployment group but some reasons can actually be explained by the converters (mechanisms) that were identified in the studies. Thus, the results emphasise the importance of investing in labour market policies, particularly during economic downturns. This is the time when cuts in unemployment benefit do not help the unemployed back to the labour market since there are very few available jobs to apply for. It is also the time when the long-term unemployed should participate in ALMP-training in order to be prepared for new challenges when the labour market improves again. As a matter of fact, the results show that skills from ALMP-training have a bridging effect which indicates that these skills will be valuable on the labour market for at least another five years after the year of investment. The findings in this thesis are controversial since they differ from most research findings from the beginning of the 1990s which point to poor micro level outcomes. However, the long-term approach of this thesis is the main explanation for these new and different results.  It is argued here that a long-term approach is needed to find out the long-term effects because ALMP participation, particularly ALMP-training, is meant to be a long-term investment in human capital. A long period of time needs to pass between ALMP-investment and evaluation before the effects can show. Reported effects from ALMP investments at the beginning of the 1990s have often been measured on a short-term basis. It is not suggested that short-term effects should be ignored but it is argued that a short-term analysis provides only a fragmental description of reality, and long-term effects should be given greater priority than is usually the case since they affect the labour market prospects of the individuals over a long period of time. This thesis dispels the “myth” about the negative effects generated from ALMPs during the 1990s.

Syftet är att evaluera Baselramverkets riskreglering i en konjunkturcykel med hänsyn till Östersjöregionens storbankers systemviktiga funktion. Studien antar främst en kvantitativ ansats i de två första delarna, nyckeltalsanalysen och buffertsimuleringen men även en kvalitativ ansats antas i den tredje delen, intervjuer.  Studien utgår från teorierna om Basel I och Basel II, nyckeltalsteori samt från tidigare forskning. Resultatet i studien består av nyckeltalanalys och simulering av åtta, i Östersjöregionen verksamma, bankers nyckeltal och buffert under 21 år samt sex djupintervjuer med representanter för såväl banker som regulatorer.  Slutsatser Att det inte finns något samband mellan Baselregleringens kapitaltäckning och bankernas risk eller konjunktur, att riskvägningen tenderar till att vara godtycklig och har större påverkan på buffert än Baselregleringens kapitaltäckning samt att mer transparens behövs i bankerna tyder på att Baselregleringens kapitaltäckningskrav i mycket liten utsträckning visar Östersjöregionens storbankers faktiska risk. / The purpose is to evaluate the Basel framework risk regulation in an economic cycle, in account to the systemic function of the large banks in the Baltic Sea region. The study mainly adopts a quantitative approach in the two first parts, the key ratio analysis and the buffer simulation. A qualitative element is also implemented in the third part, interviews. In a theoretical perspective the study is based on the Basel I and Basel II framework, key ratio theories and previously conducted research.  The result consists of key ratios analysis and buffer simulation for eight banks in the Baltic Sea region for a period of 21 years and interviews with six representatives of banks and regulatory institutions.  Conclusion                                   The absence of correlation between the Basel regulation capital adequacy and the bank risk nor economic cycle, that risk weighting tends to be arbitrary and have greater impact on bank buffer than capital adequacy regulation has, and that more transparency is needed in banking; suggests that the Basel capital adequacy to a small extent reflect actual risk.

鄉鎮市公所是我國政治體制最基層之地方自治團體，與民眾第一線接觸之政府層級。其所擁有之財政預算權是重要權力之一，但隨著民主政治的邁進，形成以選票為導向之地方自治。行政首長背負著選票與連任壓力，為實現其選舉支票或取悅選民，或許會產生以有限之資源實現其無限之願景，漠視其財政責任。 本文以台北縣之29個鄉鎮市公所，取用自89年至97年之預算資料，以單變數檢定之實證分析加以探討地方選舉對地方政府預算分配的影響，作為地方政府治理之參考依據。 實證結果顯示，台北縣29個鄉鎮市公所的預算分配於選舉年時整體預算規模並未大幅增加，但某些政事別支出卻明顯高於非選舉年。表示為刺激選情、替選舉加温，會有以加重某些政事別支出而排擠某些資本門建設經費之政策操作。 當只考慮政黨因素時，分立政府之總歲出較一致政府明顯偏高，顯示在分立政府之府會關係下，為化解僵局、使政策推動順遂，在雙方妥協、談判下，有不斷增加各部門預算的現象。 當選舉因素與政黨因素同時考量時，分立政府與一致政府之預算分配並無太明顯差異，在總預算規模不擴增情況下，以調動資本門經費用以增加可刺激選情之經常門經費，並以增加交通支出之資本門經費以突顯其建設地方、促進經濟發展之政績。 關鍵詞：預算分配、分配理論、政治景氣循環 / This paper analyzes the impact of election and government structure factors on municipal budget behavior. For the purpose of empirical analysis, we have obtained 29 townships of Taipei County during a nine-year period from 2000 to 2009, with Univariate tests for each selective budget expenditure variable affect by selective political factor. Empirical evidence is found no significant influence in the local budget to manipulate the economy at election year. When consider the political party factor, the divided government is significantly higher total expenditure than unified government. When consider both election and political party factor, budget distribution has no significant difference between divided government and unified government. The total budget scale does not increase but transfer capital expenditure to general expenditure and increase the capital expenditure of traffic topic for stand out political achievements to construct the place and promote the economic development. Keyword：Budget Distribution, Distribution Theories, Political Business Cycle

Calif., Univ., Dep. of Economics, Diss.--Stanford, 2003. / Kopie, ersch. im Verl. UMI, Ann Arbor, Mich. - Enth. 3 Beitr.

Zugl.: Frankfurt (Main), Univ., Diss., 2009

Esta tese é composta de três ensaios. No primeiro ensaio, nós examinamos se os efeitos reais das ações de política monetária no Brasil são assimétricos. Para isto, estimamos modelos Markov-switching que permitem que os choques monetários positivos e negativos afetem a taxa de crescimento do produto de forma assimétrica nos estados de expansão e recessão econômica. Os resultados obtidos mostram que: i) quando as ações de política monetária são mensuradas através das inovações ortogonalizadas para a taxa Selic em um modelo VAR, os efeitos reais de choques monetários negativos são maiores do que os de choques positivos no estado de expansão e os efeitos reais de choque negativos são maiores em expansão do que em recessão econômica; ii) quando a variação na taxa de juros Selic é tomada como medida de política monetária, nós constatamos também assimetrias entre os efeitos reais de variações positivas e negativas na taxa Selic durante a fase de recessão, e entre os efeitos reais de variações negativas na taxa Selic entre as fases do ciclo de negócios. No segundo ensaio, nós procuramos aperfeiçoar o entendimento da política monetária brasileira sob o regime de metas de inflação através da calibração das preferências do Banco Central. m específico, nós calibramos a função perda do policymaker escolhendo, de uma ampla classe de políticas alternativas, os valores dos parâmetros de preferência que minimizam o desvio entre a trajetória ótima e a trajetória verdadeira da taxa Selic. Nossos resultados mostram que o Banco Central tem adotado um regime de metas de inflação flexível e dado um maior peso à estabilização da inflação. Nós constatamos também que a preocupação da autoridade monetária com a suavização da taxa de juros tem sido maior do que com a estabilização do produto. O terceiro ensaio investiga a existência de possíveis assimetrias nos objetivos do Banco Central. Assumindo que a função perda é assimétrica em relação a desvios positivos e negativos do gap do produto e da taxa de inflação em relação à meta, nós estimamos uma função de reação não-linear que permite identificar e testar a significância estatística dos parâmetros de assimetrias nas preferências da autoridade monetária. Para o período de 2000-2007, os resultados indicaram que o Banco Central brasileiro apresentou uma preferência assimétrica a favor de uma inflação acima da meta. Visto que este comportamento pode ser decorrente das decisões de política em momentos de fortes crises (tais como as de 2001 e 2002), nós delimitamos a nossa amostra para o período de 2004-2007. Para este período, nós não encontramos evidências empíricas apontando para qualquer tipo de assimetria nas preferências sobre a estabilização da inflação e do gap do produto. / This thesis is composed of three essays. In the first essay, we check whether the effects of monetary policy actions on output in Brazil are asymmetric. Therefore, we estimate Markov-switching models that allow positive and negative shocks to affect the growth rate of output in an asymmetric fashion in expansion and recession states. Results show that: i) when monetary policy actions are measured by means of orthogonalized innovations for the Selic rate in a VAR model, the real effects of negative monetary shocks are larger than those of positive shocks in an expansion and the real effects of negative shocks are greater in an expansion than in a recession; ii) when the variation in the Selic rate is used to measure monetary policy, we also have asymmetries between the real effects of positive and negative variations in the Selic rate during a recession, and between the real effects of negative variations of the Selic rate between the states of the business cycle. In the second essay, we seek to further elucidate the Brazilian monetary policy under the inflation targeting regime by calibrating Central Bank preferences. More specifically, we calibrate the policymaker’s loss function by choosing the preference parameter values which minimize the deviation between the optimal and actual paths of the basic interest rate (Selic). Our results indicate that the Central Bank has adopted a flexible inflation target regime and placed some greater weight upon inflation stabilization. We also find out that the monetary authority’s concern with interest rate smoothing has been far deeper than with output stabilization. The third essay investigates the existence of possible asymmetries in the Central Bank of Brazil’s objectives. By assuming that the loss function is asymmetric with regard to positive and negative deviations of the output gap and of the inflation rate from its target, we estimated a nonlinear reaction function which allows identifying and checking the statistical significance of asymmetric parameters in the monetary authority’s preferences. For years 2000 to 2007, results indicate that the Central Bank of Brazil showed asymmetric preference over an above-target inflation rate. Given that this behavior may stem from policy decisions in periods of severe crises (e.g., in 2001 and in 2002), we restricted our sample to the 2004-2007 period. We did not find any empirical evidence of any type of asymmetry in the preferences over the stabilization of inflation and of the output gap for this period.

Esta tese é composta de três ensaios. No primeiro ensaio, nós examinamos se os efeitos reais das ações de política monetária no Brasil são assimétricos. Para isto, estimamos modelos Markov-switching que permitem que os choques monetários positivos e negativos afetem a taxa de crescimento do produto de forma assimétrica nos estados de expansão e recessão econômica. Os resultados obtidos mostram que: i) quando as ações de política monetária são mensuradas através das inovações ortogonalizadas para a taxa Selic em um modelo VAR, os efeitos reais de choques monetários negativos são maiores do que os de choques positivos no estado de expansão e os efeitos reais de choque negativos são maiores em expansão do que em recessão econômica; ii) quando a variação na taxa de juros Selic é tomada como medida de política monetária, nós constatamos também assimetrias entre os efeitos reais de variações positivas e negativas na taxa Selic durante a fase de recessão, e entre os efeitos reais de variações negativas na taxa Selic entre as fases do ciclo de negócios. No segundo ensaio, nós procuramos aperfeiçoar o entendimento da política monetária brasileira sob o regime de metas de inflação através da calibração das preferências do Banco Central. m específico, nós calibramos a função perda do policymaker escolhendo, de uma ampla classe de políticas alternativas, os valores dos parâmetros de preferência que minimizam o desvio entre a trajetória ótima e a trajetória verdadeira da taxa Selic. Nossos resultados mostram que o Banco Central tem adotado um regime de metas de inflação flexível e dado um maior peso à estabilização da inflação. Nós constatamos também que a preocupação da autoridade monetária com a suavização da taxa de juros tem sido maior do que com a estabilização do produto. O terceiro ensaio investiga a existência de possíveis assimetrias nos objetivos do Banco Central. Assumindo que a função perda é assimétrica em relação a desvios positivos e negativos do gap do produto e da taxa de inflação em relação à meta, nós estimamos uma função de reação não-linear que permite identificar e testar a significância estatística dos parâmetros de assimetrias nas preferências da autoridade monetária. Para o período de 2000-2007, os resultados indicaram que o Banco Central brasileiro apresentou uma preferência assimétrica a favor de uma inflação acima da meta. Visto que este comportamento pode ser decorrente das decisões de política em momentos de fortes crises (tais como as de 2001 e 2002), nós delimitamos a nossa amostra para o período de 2004-2007. Para este período, nós não encontramos evidências empíricas apontando para qualquer tipo de assimetria nas preferências sobre a estabilização da inflação e do gap do produto. / This thesis is composed of three essays. In the first essay, we check whether the effects of monetary policy actions on output in Brazil are asymmetric. Therefore, we estimate Markov-switching models that allow positive and negative shocks to affect the growth rate of output in an asymmetric fashion in expansion and recession states. Results show that: i) when monetary policy actions are measured by means of orthogonalized innovations for the Selic rate in a VAR model, the real effects of negative monetary shocks are larger than those of positive shocks in an expansion and the real effects of negative shocks are greater in an expansion than in a recession; ii) when the variation in the Selic rate is used to measure monetary policy, we also have asymmetries between the real effects of positive and negative variations in the Selic rate during a recession, and between the real effects of negative variations of the Selic rate between the states of the business cycle. In the second essay, we seek to further elucidate the Brazilian monetary policy under the inflation targeting regime by calibrating Central Bank preferences. More specifically, we calibrate the policymaker’s loss function by choosing the preference parameter values which minimize the deviation between the optimal and actual paths of the basic interest rate (Selic). Our results indicate that the Central Bank has adopted a flexible inflation target regime and placed some greater weight upon inflation stabilization. We also find out that the monetary authority’s concern with interest rate smoothing has been far deeper than with output stabilization. The third essay investigates the existence of possible asymmetries in the Central Bank of Brazil’s objectives. By assuming that the loss function is asymmetric with regard to positive and negative deviations of the output gap and of the inflation rate from its target, we estimated a nonlinear reaction function which allows identifying and checking the statistical significance of asymmetric parameters in the monetary authority’s preferences. For years 2000 to 2007, results indicate that the Central Bank of Brazil showed asymmetric preference over an above-target inflation rate. Given that this behavior may stem from policy decisions in periods of severe crises (e.g., in 2001 and in 2002), we restricted our sample to the 2004-2007 period. We did not find any empirical evidence of any type of asymmetry in the preferences over the stabilization of inflation and of the output gap for this period.

The last ten years have been extremely challenging for both researchers in monetary economics and policymakers.The Global Financial Crisis of 2007-2009, in spite of its size and severity, was initially widely perceived in the Euro Area (EA) as an imported and transitory crisis: it was frequently predicted that the EA economy would recover once the US and the World Economy rebounded. Instead, after a brief period of recovery, the Euro Area was hit by the Sovereign Debt Crisis of 2011-12, a domestic crisis which widened the divide already existing between core and peripheral countries up to the point of threatening a break-up of the euro. Thanks to the bold monetary policy response of the ECB this fear gradually vanished, but the sudden fall in oil price and the uncertain economic outlook led to the low inflation period, particularly severe in the EA, in which inflation, both in terms of headline and core measures, is well below the ECB target of 2%. This prompted the ECB to launch its Quantitative Easing program, at the beginning of 2015, much later than what the FED implemented to offset the impact of the 2007-09 crisis.This dissertation consists of two different but interlinked parts, which contribute to the empirical literature on monetary policy, low inflation and the business cycle. The first part is composed by Chapters I and II, and it is devoted to analyse the EA economy, both before the Global Financial Crisis and during the most recent low inflation period. The second one, composed by Chapters III and IV, focuses on the US economy to evaluate the possible negative consequences of the extraordinary monetary stimulus undertaken by the FED. In particular, we study the risks for both price and financial stability of the effects of the so called lift-off, i.e. the gradual normalization of monetary stance. In the first Chapter, we provide novel evidence on the different effects of the ECB common monetary policy on euro-area core and peripheral countries even before the eruption of the crisis.We estimate a structural dynamic factor model on a large panel of Euro Area quarterly variables to take into account both the comovement and the heterogeneity in the EA business cycle, and we then simulate the model to investigate the possible existence of asymmetric effects of ECB monetary policy on member states' economies. Data stop before the eruption of the Global Financial Crisis in order to only assess conventional monetary shocks, which are identified by means of sign restrictions. Although the introduction of the euro has changed the monetary transmission mechanism in the individual countries towards a more homogeneous response, we find that differences still remain between North and South Europe in terms of prices and unemployment. These results are the consequence of country-specific structures, rather than of European Central Bank policies.In the second Chapter we use a Bayesian VAR model to analyse the transmission of global and domestic shocks in the euro area, with a particular focus on the drivers of inflation, especiallyin the recent period labeled as low inflation. We identify several shocks by means of sign restrictions, and we account for the role of ECB unconventional monetary policies by using a shadow interest rate. We document that the recent low inflation phase was not entirely attributable to falling oil prices, but also to slack in economic activity and to insufficiently expansionary monetary policy, because of the Zero Lower Bound of interest rates. Interestingly, we show that the launch of the ECB Quantitative Easing turned the monetary stance into more accommodative, preventing deflationary outcomes. In the third Chapter we provide an empirical evaluation of the existence of a "dark side" of monetary policy, i.e. the possibility that credit spreads abruptly rise following a monetary tightening, after being compressed by an extraordinary period of monetary easing. This would create a problematic trade--off for the central bank, as temporary monetary expansions might at once stimulate the economy and sow the seeds of abrupt and costly financial market corrections in the future in terms of risks for financial stability (Stein, 2014).We investigate this possibility using data for the US by exploiting non-linear methods to examine the propagation of monetary shocks through US corporate bond markets. Across different methodologies, we find that the transmission of monetary shocks is mostly symmetric. What is asymmetric is instead the impact of macroeconomic data releases: spreads respond more to bad news. Crucially, these responses anticipate economic slowdowns rather than causing them directly.However, empirical evidence points to the possibility of larger effects of expansionary monetary shocks depending on (i) the type of non-linear estimation technique (ii) the identification of the shock and (iii) the inclusion of unconventional measures in the analysis. Finally, in the fourth Chapter, we ask whether the FED has riskily delayed the exit from its large monetary easing, increasing the probability of a future inflationary burst. We do so by means of medium and larger scale Bayesian VAR, which we use for both structural analysis, i.e. the evaluation of monetary policy shocks, and forecasting, i.e. the running of counterfactuals and scenario analysis.We show that expansionary monetary policy did not trigger a large deviation of inflation from its steady state. Furthermore, the FED monetary stance is totally in line with the concurrent macroeconomic dynamics. Last, our model predicts that US core inflation will lie well below its 2% target in 2017, a finding only recently acknowledged by the FOMC projections. / Doctorat en Sciences économiques et de gestion / info:eu-repo/semantics/nonPublished

L’utilisation de modèles DSGE, construits à partir de comportements micro-fondés des agents économiques, s'est progressivement imposée aux institutions pour l'analyse macroéconomique du cycle d'affaires et l'évaluation de politiques, grâce à leur cohérence interne. La crise financière récente et la préoccupation que représente la persistance du chômage à un niveau élevé plaident en faveur de modèles qui tiennent compte des ajustements imparfaits de l'offre et de la demande sur les marchés du crédit et du travail. Pourtant, des modèles relativement rudimentaires dans leur représentation de ces marchés, comme celui de Smets et Wouters (2003-2007), reproduisent aussi bien les données que des modèles économétriques usuels. On peut donc légitimement s'interroger sur l'intérêt de prendre en compte ces frictions dans la spécification des modèles théoriques destinés à l'analyse économique opérationnelle. Dans cette thèse, je réponds à cette question en montrant que l'inclusion de mécanismes microfondés, spécifiques aux marchés du crédit et du travail peut modifier très significativement les conclusions obtenues à partir d'un modèle DSGE estimé, tant d'un point de vue positif que normatif. Pour cela, je construis un modèle à deux pays de la France et du reste de la zone euro, avec un reste du monde exogène, et l'estime avec et sans ces deux frictions, en utilisant une approche hayésienne. Par rapport aux modèles existant dans la littérature, je propose deux améliorations à la spécification du marché du travail. Premièrement, suivant Pissarides (2009), le salaire réel moyen est rendu rigide en supposant que seuls les nouveaux employés renégocient leur rémunération. Deuxièmement, le taux de participation sur le marché du travail est rendu endogène et le chômage involontaire, dans le sens où le bien-être des chômeurs est inférieur à celui des employés. L'inclusion de ce dernier mécanisme dans le modèle estimé fera cependant I'objet de travaux futurs.Afin de mettre en évidence les effets des frictions sur les marches du crédit et du travail, je soumets les quatre versions estimées du modèle à plusieurs exercices: une analyse en contributions des chocs structurels pendant la crise. L'évaluation de différentes règles de politique monétaire, la simulation contrefactuelle de la crise sous l'hypothèse d'un régime de change flexible entre la France et le reste de la zone euro et, enfin. la simulation de variante de TVA sociale. / Thanks to their internal consistency. DSGE models, built on microecoc behavor, have become prevalenl for business cycle and policy analysis in institutions. The recent crisis and governments' concern about persistent unemployment advocate for mechanism, capturing imperfect adjustments in credit and labor markets. However, popular models such as the one of Smets and Wouters (2003-2007), although unsophisticated in their representation of these markets, are able to replicate the data as well as usual econometric tools. It is thus necessary to question the benefits of including these frictions in theoretical models for operational use.ln this thesis, I address this issue and show that microfounded mechanisms specifiç to labor and credit markets can significantly alter the conclusions based on the use of an estimated DSGE model, fom both a positive and a normative perspective.For this purpose, I build a two-country model of France and the rest of the euro area with exogenous rest of the world variables, and estimate it with and without these two frictions using Bayesian techniques. By contrast with existing models, I propose two improvements of the representation of labor markets. First, following Pissarides (2009), only wages in new jobs are negotiated by firms and workers, engendering stickiness in the average real wage. Second, I develop a set of assumptions to make labor market participation endogenous and unemployment involuntary in the sense that the unemployed workers are worse-off that the employed ones. Yet, including this setup in the estimated model is left for future research.Using the four estimated versions of the model, I undertake a number of analyses to highlight the role of financial and labor market frictions : an historical shock decomposition of fluctuations during the crisis, the evaluation of several monetary policy rules, a counterfactual simulation of the crisis under the assumption of a flexible exchange rate regime between France and the rest of the euro area and, lastly, the simulation of social VAT scenarios.