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Cette thèse porte sur la prise en compte des interactions dans l’estimation de l’effet d’une politique publique. En effet, les méthodes standards d’estimation s’appuient généralement sur des hypothèses fortes excluant partiellement ou totalement les effets d’interactions aussi bien dans le processus de sélection des bénéficiaires que dans la performance de la politique. Cependant, la validité de ces hypothèses est discutable surtout dans le cadre d’une politique non-expérimentale, car un individu selon qu’il est bénéficiaire ou non de la politique ne vit pas en autarcie, il est en interaction avec son milieu. Ainsi, l’effet estimé de la politique par les méthodes traditionnelles est susceptible d’être biaisé (surestimation ou sous-estimation), avec pour conséquences des prises de décisions basées sur des résultats non fiables.Dans cette thèse, nous supposons que le traitement reçu par un individu peut affecter les autres individus de son voisinage à travers différents mécanismes de diffusion. Nous proposons un cadre méthodologique d’évaluation basé sur les méthodes de l’économétrie spatiale. Nous développons quatre extensions spatialisées de méthodes d’évaluation prenant en compte les interactions dans les processus de sélection et au niveau de la performance de la politique, avec une application empirique pour chaque méthode. / This thesis focuses on the integration of interactions in the estimation of the public policy’s effect. Indeed, the estimation standard methods usually rely on strong assumptions that exclude partially or completely the interaction effect both in the selection process of beneficiaries and in the performance of the policy. However, the validity of these assumptions is questionable, particularly in the context of a non-experimental policy because an individual according as it is the beneficiary or not the policy, is not isolated: he interacts with his neighborhood. Thus, the estimated effect of the policy by traditional methods is likely to be biased (underestimation or overestimation) therefore induce decision-making based on erroneous conclusions. Therefore, in this thesis, we assume that the treatment received by an individual can affect other individuals in his neighborhood through different diffusion mechanisms. Using spatial econometric methods, we propose a methodological framework to take into account both in selection process and in the outcomes the interactions in the estimation of the policy effect. Four extensions of the evaluation methods are developed with an empirical study for each method.

This paper is dedicated to the empirical analysis of the pilot trainee project Stáže ve firmách, which is considered as treatment in this analysis. The main objective of the empirical analysis is estimation of average treatment effect(ATE) and average treatment effect on treated(ATET) for characteristics like socioeconomic status and wage. Counterfactual methods for policy impact evaluation like Difference in Differences Estimator(DiD), First Differences Estimator(FD) and Propensity Score Matching(PSM) are used to estimation mentioned effects. This paper contains extension of Assignment Problem that is used for people matching purposes as alternative for PSM. This way of matching provides better control over creation of couples. Resulting pairs are more similar in selected characteristics due to better control during couples creation process.

本文使用分量處理效果方法，分析通貨膨脹目標政策對通貨膨脹的影響。 依據Svensson (1997)與Orphanides and Wilcox (2002)的理論可知，當通貨膨脹低於目標區間時，通貨膨脹目標政策對通貨膨脹具有正向的效果；當通貨膨脹高於目標區間時，具有負向的效果；而當通貨膨脹位於目標區間時，效果微弱。本文利用1980年--2010年17個國家的年資料作實證分析。實證結果發現，通貨膨脹目標政策在不同分量的通貨膨脹下對通貨膨脹的影響有所不同。當通貨膨脹低的時候，通貨膨脹目標政策對通貨膨脹具有正向效果；然而，當通貨膨脹高的時候，具有負向效果，且隨著通貨膨脹的上升，負向效果有增強的趨勢。此結果與前述理論一致。 即使考慮刪去高通貨膨脹國家、將不同開發程度的國家分開討論、不同的資料期間和不同的政策開始時間，均得到類似的結果。

As in any other sector, the Covid-19 outbreak has caused many changes in education, and there is a reasonable expectation for this intervention to have a significant impact on the students and their performance. The purpose of this study was to analyse the effects of the digital semester, imposed on students due to Covid-19 outbreak, on student academic success. Using a quasi-experimental methodological approach called dif-in-dif analysis, three empirical models were constructed to analyse if there is an overall effect when comparing our control and treatment groups, as well as if there were any group-specific differences when it comes to the performance across genders and educational levels. The study found a significant negative effect of the digital semester on student academic success, suggesting that students performed significantly worse after the Covid-19 outbreak caused the University to step away from face-to-face teaching and adapt to remote studies. Furthermore, it was found that gender-specific differences do not affect the academic performance of our treatment group; however, female students performed worse when the digital semester was implemented compared to the control group who had both the classes and exams face-to-face. Lastly, Master students were found to perform significantly worse compared to Bachelor students’ when the Covid-19 outbreak caused the education to transfer to the digital environment.

RATIONALE & OBJECTIVE: Patients receiving maintenance dialysis have higher mortality after primary percutaneous coronary intervention (pPCI) than patients not receiving dialysis. Whether pPCI confers a benefit to patients receiving dialysis that is similar to that which occurs in lower-risk groups remains unknown. We compared the effect of pPCI on in-hospital outcomes among patients hospitalized for ST-elevation myocardial infarction (STEMI) and receiving maintenance dialysis with the effect among patients hospitalized for STEMI but not receiving dialysis. STUDY DESIGN: Retrospective cohort study. SETTING & PARTICIPANTS: We used the National Inpatient Sample (2016-2018) and included all adult hospitalizations with a primary diagnosis of STEMI. PREDICTORS: Primary exposure was PCI. Confounders included dialysis status, demographics, insurance, household income, comorbidities, and the elective nature of the admission. OUTCOME: In-hospital mortality, stroke, acute kidney injury, new dialysis requirement, vascular complications, gastrointestinal bleeding, blood transfusion, mechanical ventilation, palliative care, and discharge destination. ANALYTICAL APPROACH: The average treatment effect (ATE) of pPCI was estimated using propensity score matching independently within the group receiving dialysis and the group not receiving dialysis to explore whether the effect is modified by dialysis status. Additionally, the average marginal effect (AME) was calculated accounting for the clustering within hospitals. RESULTS: Among hospitalizations, 4,220 (1.07%) out of 413,500 were for patients receiving dialysis. The dialysis cohort was older (65.2 ± 12.2 vs 63.4 ± 13.1, P < 0.001), had a higher proportion of women (42.4% vs 30.6%, P < 0.001) and more comorbidities, and had a lower proportion of White patients (41.1% vs 71.7%, P < 0.001). Patients receiving dialysis were less likely to undergo angiography (73.1% vs 85.4%, P < 0.001) or pPCI (57.5% vs 79.8%, P < 0.001). Primary PCI was associated with lower mortality in patients receiving dialysis (15.7% vs 27.1%, P < 0.001) as well as in those who were not (5.0% vs 17.4%, P < 0.001). The ATE on mortality did not differ significantly (P interaction = 0.9) between patients receiving dialysis (-8.6% [95% CI, -15.6% to -1.6%], P = 0.02) and those who were not (-8.2% [95% CI, -8.8% to -7.5%], P < 0.001). The AME method showed similar results among patients receiving dialysis (-9.4% [95% CI, -14.8% to -4.0%], P < 0.001) and those who were not (-7.9% [95% CI, -8.5% to -7.4%], P < 0.001) (P interaction = 0.6). Both the ATE and AME were comparable for other in-hospital outcomes in both groups. LIMITATIONS: Administrative data, lack of pharmacotherapy and long-term outcome data, and residual confounding. CONCLUSIONS: Compared with conservative management, pPCI for STEMI was associated with comparable reductions in short-term mortality among patients irrespective of their receipt of maintenance dialysis.

Syftet med studien var att utifrån specifika frågeställningar systematiskt granska vetenskapliga studier av audiologisk grupprehabilitering. I studien undersöktes själva definitionen av audiologisk grupprehabilitering, hur olika variabler påverkar resultatet, hur utvärderingen bör ske samt hur den förhåller sig till de uppställda målen.     Den metod som tillämpats är litteraturstudie. För litteratursökningen till denna studie användes databaserna PubMed och Cinahl. Vissa artiklar söktes även från vetenskapliga studiers referenslistor samt tips från handledare.       Resultaten från de olika studierna visar att nytta med rehabilitering varierar då många aspekter spelar in och påverkar utgången av rehabiliteringsinsatsen. Rehabiliteringen bör ses som en patientcentrerad problemlösande process för att nå alla individers önskemål. När patienten själv är mer aktiv i utvärderingen ökar möjligheten att uppnå målen gällande grupprehabilitering. Hänsyn måste tas till varje enskild individs sociala bakgrund för att skapa ett audiologiskt rehabiliteringsprogram som möter deras krav vid lyssnande och kommunikation. Individens livsstil, kommunikationsvanor, krav och egenheter interagerar med fysiska begrepp såsom graden och formen på hörselnedsättningen.    Audiologisk grupprehabilitering är en åtgärd för att förbättra eller lindra problem vid hörselnedsättning och de olika studierna visar på varierande resultat. Grupprehabiliteringens mål skall möta patientens behov. För att nå dit behövs utvärderingsmetoder som är personcentrerade och problemlösande. Användandet av öppna frågeformulär är ett sätt att nå det kriteriet. / The purpose with this study was to systematically examine scientific studies of audiologic group rehabilitation. The definition of audiological rehabilitation was explored, different variables that influence the result and how the outcome measures should be done and its relationship with the goals of audiologic rehabilitation.    The method used was a literature study. Pubmed and Cinahl were used for the search of literature. Some articles were searched from scientific studies reference lists and also advice from the supervisor.   The result from the different studies shows that the effect of rehabilitation varies as there are many aspects that have an affect on the outcome measure. Rehabilitation should be seen as a patient centered problem solving process in order to reach the goals of all the individuals. When the patient is more active in the outcome measure procedure the goals also comply with the group rehabilitation. Consideration must be taken to social background of each and every individual in order to create an audiological rehabilitation program that meets their hearing and communication requirements.  The lifestyle, communication habits and singularity of the individual interact with physical conceptions as well as the grade and shape of the hearing impairment.   Audiological group rehabilitation is a mean to improve or relieve problems due to hearing impairment and the different studies show that the result varies. The goals of group rehabilitation should meet the need of the patient. In doing so there is a need of outcome measures that are person centered and problem solving. Using open questionnaires is a method to reach that criterion. / <p>Examensarbete inom audionomprogrammet, Göteborgs universitet. </p>

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Dans le contexte de la mondialisation, le projet d’émission d’une monnaie unique en Afrique de l’Ouest, initié par la CEDEAO en 1999, offre aux petites économies de la sous-Région de nouvelles opportunités. Le marché unique accroitrait la taille des marchés domestiques, favoriserait les économies d'échelle, simulerait la profitabilité des investissements et l’accroissement du Produit potentiel des économies. La présente Thèse étudie les implications associées à cette évolution monétaire projetée, dans la perspective des pays de la sous-Région qui conduisent actuellement une politique monétaire et de change autonome. Les résultats montrent que les économies de la CEDEAO ne sont pas synchrones, notamment par rapport à leur cycle de croissance. L’analyse des mésalignements établit que la non-Participation à une union monétaire ne protège pas contre les déséquilibres de change. Une participation de la Gambie, de la Guinée ou de la Sierra-Leone à l’UEMOA aurait été préférable, entre 1994 et 1999. Mais cet avantage se réduit ou disparaît à partir de 2000. Le bien-Être mesuré par la croissance du PIB ou par l’IDH n’est pas affecté par la participation à une zone ou à une union monétaire. Toutefois, une telle participation a un effet vigoureux, positif et significatif sur le bien-Être mesuré par la consommation par habitant. Globalement, malgré la faible synchronisation des économies, la participation à l’union monétaire en Afrique de l’Ouest est associée à un niveau de mésalignement équivalent ou plus faible que celui de la non-Participation, sauf pour le Ghana et le Nigéria. Mais une telle participation pourrait accroître la consommation par habitant. Le projet de monnaie unique de la CEDEAO est donc pertinent pour les économies de la ZMAO. / The context of the globalization suggests that the project of a West African common currency launched by the ECOWAS commission in 1999 is a potential source of opportunities for the small economies of the sub-Region. The common market will increase the scale of their small domestic markets; facilitate the realization of the scale economies; enhance the profitability of the investments and improve the potential product of the economies. Thus, this thesis aims to analyse the effect of that monetary evolution planned for countries following an autonomous monetary and exchange policy in the West African sub-Region. The results show that the economies of the sub-Region are not symmetric, especially because of their growth cycles. The equilibrium exchange rate analyse proves that the non-Participation in the common currency does not shield the West African economies against the exchange rate misalignment for them. Especially a participation of Gambia, Guinea or Sierra-Leone in the West African Economic and Monetary Union (WAEMU) between 1994 and 1999 would have generated a lower exchange rate misalignment for them. But that effect decreases or disappears as for 2000. On another hand, the participation in a common currency or in a monetary area in Sub-Saharian Africa does not affect the welfare measured by growth or HDI. But, both the participation in the monetary area or in the common currency improves the welfare, measured by consumption by head, strongly and significantly. Ultimately the ECOWAS economies are not robustly symmetric. Relative to the misalignment of the exchange rate the non-Participation in the WAEMU is not better, except for Ghana and Nigeria. For all ECOWAS economies, the participation in a common currency or in a monetary area is better for their welfare, measured by the consumption by head. The ECOWAS common currency project is subsequently relevant for monetary union non-Participants economies of the sub-Region.