http://repositorio.ufc.br/handle/riufc/590 Tue, 16 Jun 2026 04:16:00 GMT 2026-06-16T04:16:00Z http://repositorio.ufc.br/handle/riufc/86605 Título: Ensaios sobre tempo de contratos Autor(es): Costa, Antonio Kassyo Monteiro Abstract: The first proposes a theoretical model that analyzes the problem of designing optimal incentive contracts in continuous time. This thesis consists of two articles. The first proposes a theoretical model that analyzes the problem of designing optimal incentive contracts in continuous time, in order to determine the contract duration, in which a risk-neutral Principal contracts a risk-averse Agent subject. The contract is rigidly defined at the initial moment, including the linear incentive scheme and the contractual horizon. The optimal duration of the contract emerges from the interaction between the intertemporal discount factor and the agent’s participation constraint, with the reservation utility level being the central element of this mechanism, showing that contract continuity is largely determined by the participation conditions required by the Agent at the initial stage of contracting. The second article analyzes the factors associated with variation in contractual outcomes of Public-Private Partnerships (PPPs), with specific emphasis on contract duration as a central variable of analysis. The investigation focuses on how contractual duration influences the log odds of different outcomes, namely success (concluded) or failure (canceled or distressed). For this purpose, a multinomial logit model is used, suitable for handling categorical dependent variables with multiple categories. The results test the hypothesis that there exists an optimal contract duration, evidenced by the estimated inverted “U” shape, the estimates corroborate the hypothesis for the “U” shape, however, for the canceled status, no statistical significance was found. The hypothesis was also tested using marginal probabilities, and the estimates suggest that the “U” shape exists only for contracts that are technically active. The findings offer relevant contributions to the improvement of contractual design in infrastructure projects, assisting public managers and policymakers in defining more efficient contractual deadlines. Tipo: Tese Thu, 01 Jan 2026 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/86605 2026-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/86084 Título: Evidências sobre financiamento e liderança feminina na expansão da oferta de educação infantil no Brasil Autor(es): Sampaio, Maria Odalice dos Santos Abstract: Early childhood education is the first stage of basic education in Brazil, and this thesis examines how oil royalties and female leadership (elected women mayors) influence the expansion of early childhood education provision in Brazilian municipalities. The thesis is composed of three essays. The first analysis shows the effect of receiving oil royalties on the Net Enrollment Rate (NER) of babies and children aged 0 to 3 in daycare centers and children aged 4 to 5 in preschool. Using a municipal panel dataset from 2007 to 2019 and fixed-effects models, it was found that municipalities benefiting from royalties enroll, on average, 1.7 percentage points more children in daycare, but show no significant impact on preschool NER. The second essay investigates the relationship between the volume of royalties received by Brazilian municipalities and the NER, using a dose–response model. The results indicate that the increase in revenue from royalties contributed positively to the expansion of daycare enrollment, suggesting a more elastic relationship between funding and this educational stage. Thus, the findings of the first two essays suggest that the receipt of oil royalties by municipalities contributes to meeting Target 1 of the National Education Plan (PNE/2014), which aims to universalize preschool attendance and ensure that at least 50% of children are enrolled in daycare. The third essay examines the relationship between close electoral contests between male and female candidates for the municipal executive and the School Attendance Rate (SAR) of children aged 0 to 3 and 4 to 5. Based on four municipal elections—held in 2004, 2008, 2012, and 2016—and using the regression discontinuity method, it was found that municipalities with female mayors have an SAR (0 to 3 years) 2.5 percentage points higher than those governed by male mayors. Therefore, the results suggest that female leadership tends to prioritize policies directed at early childhood, which may contribute to expanding access to early childhood education. Taken together, these findings reinforce that both the resources derived from oil royalties and political factors, especially the presence of women heading municipal executives, play relevant roles in the expansion of early childhood education in Brazil, highlighting that the interplay between financial resources and political will is crucial for reducing inequalities and expanding the right to education from the earliest years of life. Tipo: Tese Wed, 01 Jan 2025 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/86084 2025-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/85737 Título: Essays on the public debt in Europe Autor(es): Sampaio Filho, Luiz Almeida Abstract: The literature on European public debt is extensive and controversial. This study has therefore used a systematic approach to overcome the main difficulties in this area. In this way, it aims to answer three main questions. First, whether there is any classification of groups among European countries based on debt behavior, with some core group; if there is such a core group, what can be said about the solvency/sustainability of the debt for the countries in this group; and, whether the greater economic integration among the countries belonging to this core group translates into spillovers of shocks from one to another and, if so, in what magnitude. Cluster techniques were used to answer the first question, making it possible to distinguish three groups with a good level of precision. Next, to detect possible convergence clubs, the convergence testing methodology proposed by Phillips and Sul (2007, 2009) and the algorithms proposed by von Lyncker and Thoennessen (2017) were applied. The results confirm the existence of two debt convergence clubs in the European Union. Taking the intersection of the cluster and convergence results, a sub-sample of twelve countries was defined for which a solvency analysis was applied. To answer the second question, wavelets were used to assess the solvency/sustainability of the public debt of the twelve countries in the sub-sample. The results point to evidence of insolvent behavior in eight of the twelve countries analyzed. To answer the third question, the connectivity spillover approach proposed by Diebold and Yilmaz (2009, 2012, 2014) was applied to a VAR model structure with time-varying parameters (TVP-VAR) according to Antonakakis, Chatziantoniou, and Gabauer (2020). The results show that around 60% of the total connectivity of the network formed by the twelve countries in the sub-sample comes from spillovers, in this case from debt shocks between these countries. Spillovers increase during periods of crisis, especially during the COVID-19 pandemic. The results of this study are useful for evaluating fiscal policy and mapping the transmission of shocks, which makes it possible to adopt preventive actions aimed at reducing the negative impacts of a possible crisis, especially for a region with an unfavorable fiscal history and threatened by recent turbulence such as the European Union. Tipo: Tese Mon, 01 Jan 2024 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/85737 2024-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/83790 Título: Um passo de cada vez: a implementação de um projeto de parentalidade positiva com foco no desenvolvimento de linguagem de crianças entre 0 e 5 anos. Autor(es): Sales, Isabela Braga Tipo: Tese Wed, 01 Jan 2025 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/83790 2025-01-01T00:00:00Z