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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estimating Structural Models with Bayesian Econometrics

Sacher, Szymon Konrad January 2023 (has links)
With the ever-increasing availability of large, high-dimensional datasets, there is a growingneed for econometric methods that can handle such data. The last decade has seen the development of many such methods in computer science, but their applications to economic models have been limited. In this thesis, I investigate whether modern tools in (exact and approximate) Bayesian inference can be useful in economics. In the three chapters, my coauthors and I develop and estimate a variety of models applied to problems in organizational economics, health, and labor. In chapter one, joint with Andrew Olenski, we estimate a mortality-based Bayesian model of nursing home quality accounting for selection. We then conduct three exercises. First, we examine the correlates of quality, and find that public report cards have near-zero correlation. Second, we show that higher quality nursing homes fared better during the pandemic: a one standard deviation increase in quality corresponds to 2.5% fewer Covid-19 cases. Finally, we show that a 10% increase in the Medicaid reimbursement rate raises quality, leading to a 1.85 percentage point increase in 90-day survival. Such a reform would be cost-effective under conservative estimates of the quality-adjusted statistical value of life. In chapter two, joint with Laura Battaglia and Stephen Hansen, we demonstrate the effectiveness of Hamiltonian Monte Carlo (HMC) in analyzing high-dimensional data in a computationally efficient and methodologically sound manner. We propose a new model, called Supervised Topic Model with Covariates, that shows how modeling this type of data carefully can have significant implications on conclusions compared to a simpler yet methodologically problematic two-step approach. By conducting a simulation study and revisiting the study of executive time use by Bandiera, Prat, Hansen, and Sadun (2020), we demonstrate these results. This approach can accommodate thousands of parameters and doesn’t require custom algorithms specific to each model, making it more accessible for applied researchers. In chapter three, I propose a new way to estimate a two-way fixed effects model such as Abowd, Kramarz, and Margolis (1999) (AKM) that relaxes the stringent assumptions concerning the matching process. Through simulations, I demonstrate that this model performs well and provide an application to matched employer-employee data from Brazil. The results indicate that disregarding selection may result in a significant bias in the estimates of location fixed effects, and thus, can contribute to explaining recent discoveries about the relevance of locations in US labor markets. The three chapters demonstrate the usefulness of modern Bayesian methods for estimating models that would be otherwise infeasible, while remaining accessible enough for applied researchers. The importance of carefully modeling the data of interest instead of relying on ad-hoc solutions is also highlighted, as it has been shown to significantly impact the conclusions drawn across a variety of problems.
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2

Essays in Public Economics and Development

Lal, Parijat January 2024 (has links)
This dissertation is motivated by the study of economic development and inequality within and across nations. Spanning topics in labor and public economics, this collection of papers speaks to two overarching themes: (i) how the distribution of power affects economic outcomes, and (ii) how governments can mobilize resources and spend them effectively. In Chapter 1, I study how the allocation of ownership and control rights within firms affect responses to economic shocks. To shed light on this issue, I study the heterogeneous effects of a pro-competitive reform on cooperative manufacturing firms and their non-cooperative counterparts in India. The reform removed firm-size restrictions on the production of “reserved” items, increasing competition for incumbents in “de-reserved” product markets. Using a difference-in-differences approach, I find that supplier cooperatives (SCs), owned and controlled by producer-members who supply material inputs, are resilient to the shock in terms of total revenue and move away from the production of de-reserved items. SCs increase their share of income spent on materials relative to similarly sized non-cooperatives in the same industry and location, with some evidence of downward adjustments in labor spending. These cooperatives are able to withstand competitive pressure from entrants while broadly catering to the interests of their membership. On the other hand, worker cooperatives (WCs), owned and controlled by worker-members employed at the firm, face a sharp decline in revenue due to de-reservation, unlike their non-cooperative counterparts. A potential channel behind these results is that WCs are less likely to respond by picking up items that are not directly affected by the reform. Spending on labor does not fall as much as revenue for WCs, which is in line with the immediate interests of membership, but adjustments to labor inputs vary sigificantly across employment categories. In the following chapter, my co-author, Utkarsh Kumar, and I study the equilibrium effects of subsidizing public services in the presence of vertically differentiated public and private suppliers. We evaluate one of India’s largest welfare schemes, Janani Suraksha Yojana (JSY), which subsidized childbirth at public health institutions. JSY did not improve health outcomes despite a substantial increase in take-up of institutional care. We document three equilibrium responses that explain this policy failure. First, JSY led to a mismatch in patient risk across health facilities. High-risk mothers sorted out of the highest-quality care at private facilities and into lower-quality public facilities. Second, in response to congestion and deterioration of care at public hospitals, only mothers with high socio-economic status sorted out of congested public facilities into more expensive private facilities. Third, private hospitals increased prices without improvements in healthcare quality in a specific subset of states, further crowding out high-risk and poor mothers. These findings point to the need for complementary public policies in addition to JSY. In Chapter 3, I, along with my co-authors, Alexander Klemm and Li Liu, explore the increasingly prominent position of services in international trade and their potential to facilitate tax-driven reporting and reallocation of economic activity. Given their potential in countering this form of base erosion, withholding taxes (WHTs) on payments for services have featured extensively in ongoing reforms of the international tax architecture. The rationale behind WHTs is to preserve some taxation rights in the source country given their straightforward application, which is particularly important for low-income countries in the absence of more effective rules. We build a simple model of reporting decisions when firms have economic activities in one country and affiliates in others. We then test the predictions of this model using newly compiled data on treaty and non-treaty rates for 120+ countries over 2009-2021. Our findings indicate that while there is no significant relationship between WHTs and services trade in general, these taxes do have a strong negative impact on services imports from known low-tax jurisdictions, when base erosion is a particular concern.
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