[pt] Testes existentes para não-linearidade em Modelos de Correção de Erros são altamente intensivos computacionalmente e apresentam parâmetros de estorvo na distribuição assintótica, que precisam ser levantadas através de simulações por bootstrap. É proposto um teste consistente, implementável em qualquer pacote estatístico e que apresenta distribuição assintótica Qui-Quadrado. Além disso, experimentos de Monte Carlo mostram que em pequena amostra o teste tem boas propriedades de tamanho e poder, muitas vezes melhores do que os testes existentes. Também é apresentada uma condição sob a qual um estimador em dois estágios para os parâmetros do modelo é assintoticamente normal. A aplicação do modelo a preços internacionais de commodities agrícolas mostra evidência de ajuste não-linear nos preços de trigo. / [en] Existing tests for nonlinearity in vector error correction models are highly intensive computationally and have nuisance parameters in the asymptotic distribution, what calls for cumbersome bootstrap calculations in order to assess the distribution. Our work proposes a consistent test which is implementable in any statistical package and has Chi-Squared asymptotics. Moreover, Monte Carlo experiments show that in small samples our test has nice size and power properties, often better than the preexisting tests. We also provide a condition under which a consistent two step estimator for the model parameters is asymptotically normal. Application to international agricultural commodities prices show evidence of nonlinear adjustment to the long run equilibrium on the wheat prices.

A presente tese tenta avaliar a política monetária sob o Regime de Metas de Inflação (RMI), num contexto de flexibilidade cambial e integração financeira. No campo teórico, este trabalho avalia no primeiro ensaio, os aspectos teóricos do RMI e também do Novo Consenso Macroeconômico (NCM), assim como a crítica pós-keynesiana ao NCM. Na sequência, avalia-se a evolução do debate acerca da política monetária após a Crise Financeira Internacional, assim como os aspectos teóricos da integração financeira global e dos Ciclos Financeiros Globais, e suas consequências para a condução da política monetária. No aspecto histórico, avalia-se brevemente no segundo ensaio, o comportamento das principais variáveis macroeconômicas concernentes a política monetária, taxa de câmbio e crescimento econômico, assim como, os arranjos institucionais do RMI de cada país, evidenciando suas principais diferenças. O Brasil tem um dos RMI mais rígidos e as maiores taxas de juros entre os países analisados. No âmbito empírico, realizou-se três exercícios econométricos distintos. O primeiro, por meio do modelo VEC, comparam-se a eficiência do RMI brasileiro com outros 12 países selecionados, no que diz respeito ao controle inflacionário, ao repasse cambial e do crescimento econômico. O Brasil, assim como outros países em desenvolvimento, tem um dos RMI mais ineficientes, com evidencias da presença de price-puzzle, além de apresentar um elevado repasse cambial para o nível de preços e ter impactos no crescimento econômico. O segundo exercício econométrico buscou-se analisar a não-linearidade da política monetária brasileira com relação ao repasse cambial para o nível de preços, utilizando o modelo MS-VAR. O modelo mostrou fortes evidências empíricas de que há repasse cambial tanto em momentos de apreciação, quanto de depreciação cambial, configurando assim, uma política monetária com dois regimes cambiais. O terceiro exercício busca evidenciar, por meio do modelo VEC, os impactos que a integração financeira global, tem na condução da política monetária brasileira. Encontrou-se indícios de que a taxa de câmbio opera entre os ciclos financeiros globais e o nível de preços da economia brasileira, mostrando, assim, que a política monetária sob o RMI, tendo como base altas taxas de juros, é ineficiente. Tais fatos sugerem que a taxa de câmbio tem um papel fundamental no controle da inflação e no desempenho do próprio RMI; todavia, há a necessidade de uma reavaliação da política cambial que vêm sendo adotada no Brasil para além do papel de mecanismo de controle de preços. / This study aims to evaluate the monetary evolution of the Inflation Target Regime (IT) in a context of exchange rate flexibility and financial integration. In the theoretical field, this work was evaluated in the first essay, the theoretical questions of the IT and also of the New Macroeconomic Consensus (NMC), as well as a post-Keynesian criticism to NMC. Following an assessment of the monetary policy debate following an International Financial Crisis, as well as the financial issues for the financial and global integration of Global Financials, and their consequences for the generation of monetary policy. The evaluation of the risk in the historical statistics, the evaluation of the risk changes the monetary changes, the risk must change the expansion policies, and the risk must have different conditions. Brazil has one of the most rigid ITs and the main interest rates among the analyzed countries. In the empirical context, the different econometric exercises are carried out. The first one, through the VEC model, compares the efficiency of the Brazilian IT with 12 other selected countries, than respect for inflationary control, exchange rate transfers and economic growth. Brazil, like other developing countries, has more inefficient IT, with evidence of the presence of price-puzzles, as well as a high exchange rate repayment for the price level and the impacts on economic growth. The second econometric exercise sought to analyze the non-linearity of the Brazilian monetary policy in relation to the pass-through to the price level, using the MS-VAR model. The model of empirical demonstrations that there is to change both in moments of appreciation and the exchange depreciation, thus forming a monetary policy with two exchange rate regimes. The third study seeks the evidence, through the VEC model, of the impacts that global financial integration has on Brazilian monetary policy. We find that the indexes of an exchange rate between the cycles and the level of prices of the Brazilian economy, thus showing a monetary policy on the IT, based on interest rates, is inefficient. Such facts should that an exchange rate has a key role in controlling the rate and performance of the IT itself; however, there is a reappraisal of the exchange rate policy that has been adopted in Brazil beyond the role of the price control mechanism.

Riksbanken har under senaste åren blivit kritiserade för deras bristande prognoser av svenska valutakurser. I denna uppsats undersöks det om slumpvandring (RW) är den mest framgångsrika prognosmodellen eller om alternativa ekonometriska prognosmodeller (AR, VAR och VECM) kan estimera framtida växelkurser mer korrekt på kort sikt, ett kvartal fram, och medellång sikt, fyra kvartal fram. I dessa prognosmodeller behandlas fem Svenska makroekonomiska variabler som endogena; KPI, BNP, arbetslöshet, 3 månaders statsobligationer (T-bonds), samt en exogen variabel, Amerikansk-BNP. Den data som används är kvartalsdata från första kvartalet 1993 till andra kvartalet 2020 för respektive variabel. Resultaten från studie visar på att RW är mer ackurat än de multivariata modellerna (VAR och VECM) på både kort sikt och medellång sikt. Residualerna utvärderas genom att kolla på rotmedelkvadratfel (RMSE) från respektive prognos. / In recent years, the Riksbank has been criticized for their underperforming forecasts of Swedish exchange rates. This thesis examines whether the random walk (RW) is the most successful forecasting model when forecasting the exchange rate (SEK / USD) or whether alternative economic forecasting models (AR, VAR and VECM) can estimate future exchange rates more accurately. Both in the short and medium term, one respectively four quarters ahead. In these forecast models, five Swedish macroeconomic variables are treated as endogenous; CPI, GDP, unemployment, three-month Treasury-bonds (T-Bonds), and an exogenous variable, US GDP. The data used is quarterly data from the first quarter of 1993 to the second quarter of 2020 for each variable. Results from the study show that RW is more accurate than the multivariate models (VAR and VECM) in both the short and medium term. The residuals are evaluated by looking at root mean square error (RMSE) from the respective forecast.

The Forest Resource Conservation and Shortage Relief Act of 1990 was the first federal attempt to impose a blanket restriction on export of roundwood to conserve existing forest cover and generate economic benefits from exporting processed wood. This study estimates the export demand equation for total export from United States Pacific Northwest, major species and destination countries using Johansen multivariate time series analysis. Cointegration rank is identified using Johansen cointegration test incorporating a structural breaks and normalized restriction is imposed to predict demand function under the framework of vector error correction model. All the variables under study are statistically significant with expected signs in the long run demand estimates. Roundwood export restriction policies are found to have impacted the export demand equation negatively. The study helps to understand the impact of log export restrictions policies along with other economic variables and assist in future policy formulations.

This research examines the impact of external shocks on Nigeria’s output performance for the period 1981 – 2015. It aims to bring to the fore the importance of considering external shocks during policy design and implementation. The multivariate VAR and VECM frameworks were used to evaluate the impact of the shock variables on Nigeria’s output performance and to achieve the stated objectives. Findings show that the external shock and domestic policy variables have short-run effects on Nigeria’s output performance. Also, all the measures of external shocks and domestic policies display some viable information in explaining the variabilities in Nigeria’s output performance over the horizon. The comparison between the results of the VECM and the unrestricted VAR shows that the unrestricted VAR model outperformed the VECM. The overall result of the study confirms the view about the vulnerability of the Nigerian economy to external shocks. These shocks explain more than half of the variance in real output performance and have varying effects on output performance in Nigeria. The dynamic response of output performance to each of the defined shock variables show that output performance responds rapidly to the shock variables, while its response to the domestic economic variables is seemingly moderate. Finally, the variance decomposition show that international crude oil price and terms of trade have the largest share in accounting for the variability in output performance, followed closely by the shares of capital inflows and monetary policy.

Yes / This paper uses panel cointegration with a corresponding vector error correction model (VECM) to investigate the changes in the value relevance of accounting information before and after the mandatory adoption of IFRS in Germany and the UK under three different valuation models. First, a basic Ohlson model, where our results indicate that despite the value relevance of the book values of equity has declined, it has been replaced by the increasing prominence of earnings in both Germany and the UK after the switch to the IFRS. Second, a modified model, which shows that the incremental value relevance of both earnings and book values are considerably higher in the long term for firms in the UK than in Germany. Third, a simultaneous addition of accounting and macroeconomic variables in an extended model, which indicates a significant rise in the relative predictive power of the book value of equity in the UK compared with the more noticeable impact on the value relevance of earnings in Germany. Collectively, the results of these models indicate that: (i) the explanatory power of linear equity valuation models is higher in UK than in the Germany, (ii) a long-run Granger-causal relationship exists between accounting variables and share prices in common law countries like the UK. Nevertheless, the implications of our findings lie in the knowledge that the potential costs of switching to the IFRS is completely nullified within three years by the benefits arising from a reduction in information asymmetry and earning mismanagement among firms which are listed on the stock exchanges of both common law and code law-based EU countries.

This thesis examines the validity of the cost of carry model for pricing FTSE100 futures contracts and the relationship between FTSE100 spot and futures markets during two sub-periods characterised by different market trading systems employed by the LSE and LIFFE. The empirical work is carried out using three approaches to econometric modeling: a basic VECM for spot and futures prices, a VECM extended with a DCCTGARCH framework to account for the conditional variance-covariance structure for spot and futures prices and a threshold VECM to capture regime-dependent spot-futures price dynamics. Overall, both the basic VECM and the DCC-TGARCH analysis suggest that there are deviations from the cost of carry relationship in the first sub-sample when transactions costs in both markets are relatively high but that the cost of carry relationship tends to be valid in the second sub-sample when transactions costs are lower. This is further confirmed by the evidence of higher conditional correlations between the two markets in the second sub-sample as compared with the first, using the DCC-TGARCH analysis. This implies that the no-arbitrage cost of carry relationship between spot and futures markets is more effectively maintained by index arbitrageurs in the second period when market conditions are closer to perfect market assumptions, and hence the cost of carry model could be more reasonably used as a benchmark for pricing stock index futures. The threshold VECM analysis depicts regime-dependent price dynamics between FTSE100 spot and futures markets and leads to some interesting and important findings: arbitrage may not be practicable under some market conditions, either because it is difficult to find counterparties for the arbitrage transactions, or because there is significant risk associated with arbitrage; as a result, the cost of carry model may not always be suitable for pricing stock index futures. Furthermore, the threshold values yielded from estimating the threshold VECM reflect the average transaction costs for most arbitrageurs that are more reliable and fair than subjective estimations.

Submitted by Maicon Juliano Schmidt (maicons) on 2015-06-16T14:20:53Z No. of bitstreams: 1 Eduarda Martins Correa da Silveira.pdf: 825671 bytes, checksum: 02c3fcea0957cd9bb91507ffbd8c96be (MD5) / Made available in DSpace on 2015-06-16T14:20:53Z (GMT). No. of bitstreams: 1 Eduarda Martins Correa da Silveira.pdf: 825671 bytes, checksum: 02c3fcea0957cd9bb91507ffbd8c96be (MD5) Previous issue date: 2015-02-27 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / O objetivo principal desta dissertação foi verificar se o balanço de pagamentos é uma limitação para o crescimento econômico brasileiro, no período que compreende os anos de 1995 até 2013, considerando o arcabouço teórico de Thirlwall (1979). Para o alcance desse objetivo, foram estimadas as funções demanda por importações e exportações através de dois modelos econométricos: vetorial de correção de erros (VAR/VEC) e modelo estrutural em formato de estado de espaço para o período 1995-2013. As funções demanda por exportações e importações também foram estimadas por meio do modelo estrutural em formato de estado de espaço para o período 2001-2013, com a intenção de verificar o impacto da elevação dos preços das commodities e o aumento na demanda por esses bens nos parâmetros calculados. Pela análise, para esse período, nota-se que o processo de commoditização da pauta de exportações brasileira aprofundou o problema da restrição externa brasileira. Na estimação da função demanda por exportações, utilizando o modelo VAR/VEC, foi incluída uma variável que representou o preço das commodities. Os resultados empíricos deste trabalho confirmam que o balanço de pagamentos é uma restrição ao crescimento econômico brasileiro, dado tanto pela razão entre as elasticidades-renda das exportações e importações, como também pela baixa sensibilidade das exportações ao câmbio real. Logo, o ajuste da balança comercial via alterações suaves da taxa de câmbio tem pouca eficácia para o caso brasileiro. Além disso, as exportações são mais sensíveis aos preços das commodities do que à taxa de câmbio real. / The main objective of the present dissertation was to verify if the balance of payments was a limitation to Brazilian economic growth, in the period of the years 1995 to 2013, considering the Thirwall's Law (1979). In order to achieve this goal, export and import demand functions were estimated by two econometric models: vector error correction (VAR/VEC) and structural state space model for the period of 1995-2013. The export and import demand functions were also estimated by the structural state space model for the period of 2001-2013, with the intention of verifying the impact of the commodities price increase and the increase in the demand for these goods in the estimated parameters. According to the analysis of this period, it has been noticed that commoditization process in the Brazilian exports agenda has increased the problem of Brazilian external constraint. In the estimation of the export demand function, using the VAR/VEC model, it was included a variable which represented commodities price. The empiric results of this paper confirm that the balance of payments is a constraint to the Brazilian economic growth, given the ratio between exports and imports income elasticities and, also, the exports low sensitivity to the real exchange. Thus, the adjustment of the balance of trade by soft alterations in the exchange rate have little efficiency for the Brazilian case. Furthermore, the exports are more sensitive to the commodities price than to the real exchange rate.

本文探討匯率不確定性與台灣對中國大陸出口之關係，模型中參考Cushman (1986) 觀點加入第三國變數之效果。研究期間以1997年至2010年之季資料，同時考慮總合資料以及部門別資料，並以GARCH估計實質匯率波動性。第三國則利用出口近似度的計算選擇了前四大競爭國，分別為南韓，日本，馬來西亞及新加坡。此外，部門則以HS二碼分類選擇出口至中國大陸前四大之部門，包括機械與電子、精密儀器、橡膠與塑膠類產品及化學品。 本文檢定變數是否有單根。若有單根則進一步檢定這些變數是否存在共整合關係。在確定存在共整合關係後，利用完全修正最小平方法及誤差修正模型進行估計。本文實證結果顯示：匯率不確定性對出口量有負向之影響關係。就部門而言，本文探討的四個部門之結果也反映匯率不確定性對出口具有負向影響，但是以電子產品及塑膠橡膠類之影響最為顯著。 / This paper investigates the relationship between exchange rate volatility and Taiwan’s exports to Mainland China. In the empirical model, the third country effects suggested by Cushman (1986) are considered. GARCH model is employed to estimate real exchange rate volatility. Both aggregate and sectoral quarterly data covering 1997 to 2010 are used in our sample. The third countries are determined by export similarity. The top 4 countries with the highest degree of export similarity are chosen, including South Korea, Japan, Malaysia and Singapore. In addition, the top 4 Taiwan’s exporting sectors are examined respectively, including machinery and electronic equipment, precision equipment, rubber and plastics, chemicals industries. We first test for unit root of the variables used in the study, and then check the existence of co-integration between the variables with unit root. After confirming the existence of co-integration relationship, we use FMOLS (Fully Modified OLS) and VECM (Vector Error Correction Model) to estimate the coefficients. Our empirical results suggest that there is a significantly negative effect of exchange rate volatility on Taiwan’s total exports. They also indicate that there is a negative relationship between exchange rate volatility and Taiwan’s sectoral exports. Among the top 4 exporting sectors, exchange rate volatility tends to have higher impacts on the machinery and electronic industry as well as chemical industry.

Vektorfehlerkorrekturmodelle (VECM) erlauben es, Abhängigkeiten zwischen den Veränderungen mehrerer potenziell endogener Variablen simultan zu modellieren. Die Idee, ein langfristiges Gleichgewicht gleichzeitig mit kurzfristigen Veränderungen zu modellieren, lässt sich vom Eingleichungsansatz des Fehlerkorrekturmodells (ECM) zu einem Mehrgleichungsansatz für Variablenvektoren (VECM) verallgemeinern. Die Anzahl der kointegrierenden Beziehungen und die Koeffizientenmatrizen werden mit dem Johansen-Verfahren geschätzt. An einer einfachen Verallgemeinerung einer Konsumfunktion wird die Schätzung und Wirkungsweise eines VECM für Verbrauch, Einkommen und Aktienkurse in Deutschland gezeigt. Die Anwendung der Beveridge- Nelson-(BN)-Dekomposition auf vektorautoregressive Prozesse ermöglicht zudem, Abhängigkeiten zwischen den aus den kointegrierten Zeitreihen extrahierten zyklischen Komponenten zu schätzen. / Vector error correction models (VECM) allow to simultaneously model dependencies between the changes of several potentially endogenous variables. The idea is the modelling of a long-run equilibrium together with the short-run dynamics. Therefore a single equation approach (ECM) can be generalised to a multi equation approach (VECM) for variable vectors. The number of cointegration relations and the coefficient matrices are estimated with the Johansen procedure. The estimation of a VECM for income, consumption and stock prices for Germany is demonstrated by using a generalised consumption function. The Beveridge-Nelson-(BN)-Decomposition procedure for vectorautoregressive processes allows extracting cyclical components of cointegrated time series and estimating the degree of co-movement between these transitory components.