Quantile Regression


Book Description

Quantile Regression, the first book of Hao and Naiman′s two-book series, establishes the seldom recognized link between inequality studies and quantile regression models. Though separate methodological literature exists for each subject, the authors seek to explore the natural connections between this increasingly sought-after tool and research topics in the social sciences. Quantile regression as a method does not rely on assumptions as restrictive as those for the classical linear regression; though more traditional models such as least squares linear regression are more widely utilized, Hao and Naiman show, in their application of quantile regression to empirical research, how this model yields a more complete understanding of inequality. Inequality is a perennial concern in the social sciences, and recently there has been much research in health inequality as well. Major software packages have also gradually implemented quantile regression. Quantile Regression will be of interest not only to the traditional social science market but other markets such as the health and public health related disciplines. Key Features: Establishes a natural link between quantile regression and inequality studies in the social sciences Contains clearly defined terms, simplified empirical equations, illustrative graphs, empirical tables and graphs from examples Includes computational codes using statistical software popular among social scientists Oriented to empirical research




Quantile Regression


Book Description

Quantile regression is gradually emerging as a unified statistical methodology for estimating models of conditional quantile functions. By complementing the exclusive focus of classical least squares regression on the conditional mean, quantile regression offers a systematic strategy for examining how covariates influence the location, scale and shape of the entire response distribution. This monograph is the first comprehensive treatment of the subject, encompassing models that are linear and nonlinear, parametric and nonparametric. The author has devoted more than 25 years of research to this topic. The methods in the analysis are illustrated with a variety of applications from economics, biology, ecology and finance. The treatment will find its core audiences in econometrics, statistics, and applied mathematics in addition to the disciplines cited above.




From Farm to Firm


Book Description

The process of rural-urban transformation presents both opportunities and challenges for development. If managed effectively, it can result in growth that benefits everyone; if managed poorly, it can lead to stark welfare disparities and entire regions cut off from the advantages of agglomeration economies. The importance of rural-urban transition has been confirmed by two consecutive World Development Reports: WDR 2008 Agriculture for Development; and WDR 2009 Reshaping Economic Geography. Focusing on Sub-Saharan Africa and South Asia, this book picks up where the WDRs left off, investigating the influence of country conditions and policies on the pace, pattern, and consequences of rural-urban transition and suggesting strategies to ensure that its benefits results in shared improvements in well-being. The book uncovers vast inequalities, whether between two regions of one country, between rural and urban areas, or within cities themselves. The authors find little evidence to suggest that these inequalities will automatically diminish as countries develop: empirical and qualitative analysis suggests that spatial divides are mainly a function of country conditions, policies and institutions. By implication, policymakers must take active steps to ensure that rural-urban transition results in shared growth. Spatially unbiased provision of health and education services is crucial to ensuring that the benefits of transition are shared by all. But connective infrastructure and targeted interventions also emerge as important considerations, even in countries with severely constrained fiscal and administrative capacity. The authors suggest steps for navigating the tricky political economy of land reforms. And they alert readers to potential spillover effects that mean that policies designed for one space can have unintended consequences on another.Policymakers and development experts, as well as anyone concerned with the impact of rural-urban transition on growth and equity, will find this book a thought-provoking and informative read.




Economic Applications of Quantile Regression


Book Description

Quantile regression has emerged as an essential statistical tool of contemporary empirical economics and biostatistics. Complementing classical least squares regression methods which are designed to estimate conditional mean models, quantile regression provides an ensemble of techniques for estimating families of conditional quantile models, thus offering a more complete view of the stochastic relationship among variables. This volume collects 12 outstanding empirical contributions in economics and offers an indispensable introduction to interpretation, implementation, and inference aspects of quantile regression.




Convergence


Book Description

Policy makers across the Middle East and North Africa have for many years articulated plans to integrate their people spatially and economically. Wishing to bring communities together and narrow economic gaps, governments have made large capital investments in transport corridors and “new cities.†? Hoping to provide jobs in places with little economic activity, governments have designated new industrial zones supported by spatially targeted business incentives. Yet the results of these place-based initiatives in MENA are limited. The disparities between capital cities and lagging areas, and between richer and poorer quarters of cities, remain stark. Across much of the region, a fortunate few are connected to opportunity, while many more people are marginal to the formal economy—or live outside it, seemingly forgotten. Why have place-based spatial initiatives in MENA countries largely underdelivered, not yielding more sustainable jobs and growth? Although the challenges are many and vary across the region, this book explains that many of these place-based policies get one thing wrong: they attempt to treat inequity‘s spatial and physical symptoms, not its causes. This book presents the five roots causes of spatial inequity in institutional inefficiencies across MENA—urban regulatory frictions, credentialist education systems, centralized control over local public services, barriers to the spatial mobility of goods and people, and barriers to market entry and lopsided business environments—within cities, within countries, and across national borders




Econometric Analysis of Cross Section and Panel Data, second edition


Book Description

The second edition of a comprehensive state-of-the-art graduate level text on microeconometric methods, substantially revised and updated. The second edition of this acclaimed graduate text provides a unified treatment of two methods used in contemporary econometric research, cross section and data panel methods. By focusing on assumptions that can be given behavioral content, the book maintains an appropriate level of rigor while emphasizing intuitive thinking. The analysis covers both linear and nonlinear models, including models with dynamics and/or individual heterogeneity. In addition to general estimation frameworks (particular methods of moments and maximum likelihood), specific linear and nonlinear methods are covered in detail, including probit and logit models and their multivariate, Tobit models, models for count data, censored and missing data schemes, causal (or treatment) effects, and duration analysis. Econometric Analysis of Cross Section and Panel Data was the first graduate econometrics text to focus on microeconomic data structures, allowing assumptions to be separated into population and sampling assumptions. This second edition has been substantially updated and revised. Improvements include a broader class of models for missing data problems; more detailed treatment of cluster problems, an important topic for empirical researchers; expanded discussion of "generalized instrumental variables" (GIV) estimation; new coverage (based on the author's own recent research) of inverse probability weighting; a more complete framework for estimating treatment effects with panel data, and a firmly established link between econometric approaches to nonlinear panel data and the "generalized estimating equation" literature popular in statistics and other fields. New attention is given to explaining when particular econometric methods can be applied; the goal is not only to tell readers what does work, but why certain "obvious" procedures do not. The numerous included exercises, both theoretical and computer-based, allow the reader to extend methods covered in the text and discover new insights.




Welfare Reform


Book Description

In Welfare Reform, Jeffrey Grogger and Lynn Karoly assemble evidence from numerous studies to assess how welfare reform has affected behavior. To broaden our understanding of this wide-ranging policy reform, the authors evaluate the evidence in relation to an economic model of behavior.




Sensitivity of welfare effects estimated by equilibrium displacement model: A biological productivity growth for semisubsistence crops in Sub-Sahara African market with high transaction costs


Book Description

This paper discusses the application of the equilibrium displacement model (EDM) to estimate ex-ante the welfare effects of biological productivity growth for semi-subsistence crop and its impact on poverty reduction. The conventionally used EDM is compared with an alternative EDM that reflects more realistic assumptions for African semi-subsistence crops, such as the shape and shift of supply curve, significant margins due to high transportation costs between farmgate and consumption market, as well as between different consumption markets, and the degree of precisions of estimated structural parameters. The application to the dataset for Benin cassava farmers provides an example that the conventional EDM may significantly overestimate the total welfare gains, and may also lead to very different interpretation of how pro-poor the technology is.




Bunching at 3 Percent: The Maastricht Fiscal Criterion and Government Deficits


Book Description

This paper estimates the effects of the Maastricht treaty’s fiscal criterion on EU countries’ general government deficits. We combine treatment effects methods with bunching estimation, and find that the 3 percent deficit rule acts as a “magnet”, increasing the number of observations around the threshold, while reducing the occurrence of both large government deficits and surpluses. After the rule is adopted, the distribution of government deficits among EU countries displays 20 percent excess mass around the deficit ceiling compared to a counterfactual distribution in which countries have the same observable characteristics but without the fiscal rule. Most of the bunching response comes from a reduction in the number of high deficit observations. We also find that the average treatment effect on fiscal deficits is positive and statistically significant. Finally, we derive country-specific impacts under a rank invariance assumption and find that all EU countries have seen their fiscal position improve on average as a result of the deficit rule.




The Analysis of Household Surveys


Book Description

Using data from several countries, including Cote d'Ivoire, India, Pakistan, Taiwan, and Thailand, this book analyzes household survey data from developing countries and illustrates how such data can be used to cast light on a range of short-term and long-term policy issues.