An overlapping generations model with non-ordered preferences and numeraire-incomplete markets*

Abstract This paper shows that, even with a life-cycle component, the standard model of competitive consumption and asset trading can be extended to encompass general preference relations, which do not necessarily hinge upon special assumptions such as time or state separability, or even completeness or transitivity. More precisely, this paper addresses the equilibrium existence for an overlapping generations pure-exchange economy with non-ordered preferences and incomplete financial markets of numeraire assets. Mathematics Subject Classification (2000): 91B50, 91B62 Journal of Economic Literature Classification: D52, D91     

Pro-poor indirect tax reforms,with an application to Mexico

This paper proposes a methodology for testing for whether tax reforms are pro-poor. This is done by extending stochastic dominance techniques to identify tax reforms that will be deemed absolutely or relatively pro-poor by a wide spectrum of poverty analysts. The statistical properties of the various estimators are also derived in order to make the method implementable using survey data. The methodology is used to assess the pro-poorness of possible reforms to Mexico’s indirect tax system. This leads to the identification of several possible pro-poor tax reforms in that country. It also shows how the pro-poorness of a tax reform depends on one’s conception of poverty as well as on the revenue and efficiency impact of the reform.     

Gender,entrepreneurship and food security in Niger

In many African countries, the income generated from the informal sector and the entrepreneurship is particularly important for reducing poverty. Previous studies have not found clear evidence on the relationship between self‐employment by gender and food security. We argue that this may be a result of the gender inequality in resource accessibility. In this paper, we analyze the implication of household entrepreneurship on food security in Niger, where gender disparities in resource accessibility are reduced. We find that owning female‐managed non‐agricultural enterprises is positively related to food accessibility and food availability within female‐headed households. The results draw the attention on reducing gender differences in resource accessibility in entrepreneurship for improving food security.     

TESTING FOR PRO-POORNESS OF GROWTH, WITH AN APPLICATION TO MEXICO

This paper proposes techniques to test for whether growth has been pro-poor. We first review different definitions of pro-poorness and argue for the use of methods that can generate results that are robust over classes of pro-poor measures and ranges of poverty lines. We then provide statistical procedures that rely on the use of sample data to infer whether growth has been pro-poor in a population. We apply these procedures to Mexican household surveys for 1992, 1998, and 2004. We find strong normative and statistical evidence that Mexican growth has been absolutely anti-poor between 1992 and 1998, absolutely pro-poor between 1998 and 2004 and between 1992 and 2004, and relatively pro-poor between 1992 and 2004 and between 1998 and 2004. The relative assessment of the period between 1992 and 1998 is statistically too weak to lead to a robust evaluation of that period.     

Chronic and transient poverty: Measurement and estimation, with evidence from China

The paper contributes to the measurement of poverty and vulnerability in three ways. First, it proposes a new approach to separating poverty into chronic and transient components. Second, it provides corrections for the statistical biases introduced when using a small number of periods to estimate the importance of vulnerability and transient poverty. Third, it applies these tools to the measurement of chronic and transient poverty in China using a rich panel data set that extends over 17 years. Alternative measurement techniques are found to yield significantly different estimates of the relative importance of chronic and transient poverty. The precision of the estimates is also considerably enhanced by simple statistical corrections.     

TESTING FOR PRO-POORNESS OF GROWTH, WITH AN APPLICATION TO MEXICO

This paper proposes techniques to test for whether growth has been pro-poor. We first review different definitions of pro-poorness and argue for the use of methods that can generate results that are robust over classes of pro-poor measures and ranges of poverty lines. We then provide statistical procedures that rely on the use of sample data to infer whether growth has been pro-poor in a population. We apply these procedures to Mexican household surveys for 1992, 1998, and 2004. We find strong normative and statistical evidence that Mexican growth has been absolutely anti-poor between 1992 and 1998, absolutely pro-poor between 1998 and 2004 and between 1992 and 2004, and relatively pro-poor between 1992 and 2004 and between 1998 and 2004. The relative assessment of the period between 1992 and 1998 is statistically too weak to lead to a robust evaluation of that period.     

Internal migration and youth entrepreneurship in the Democratic Republic of the Congo

This paper analyzes youth internal migration in the Democratic Republic of the Congo (DRC) and its impact on entrepreneurship startup in a fresh post‐conflict context. Building on a national representative survey conducted in 2005, a recursive bivariate probit specification is used to jointly estimate the decision models of both migration and entrepreneurship. To evaluate the robustness of results, the propensity score matching method is used to test the concordance of the results after eliminating the redundant impact of unobserved factors. The two main conclusions are that youth migration increases the probability of being an entrepreneur, but in the informal sector. In addition, like secondary and post‐secondary education, the duration of stay after migrating is an important factor to being an entrepreneur in the formal sector. These conclusions are expected to enlighten policy‐makers as to the importance of promoting secondary and post‐secondary education as well as inclusive growth investments that may absorb more youth labor in formal sectors. This is the first exercise in the case of the DRC and since it focuses on youth, the paper makes a unique contribution to the literature related to the link between migration and entrepreneurship in a post‐war context.     

Harsh default penalties lead to Ponzi schemes

In the presence of utility penalties, collateral requirements do not always eliminate the occurrence of Ponzi schemes. Harsh utility penalties may induce effective payments over collateral recollection values. In this event, loans can be larger than collateral costs and Ponzi schemes become possible.     

Wealth transfers and the role of collateral when lifetimes are uncertain

We develop a general equilibrium model of wealth transfers in the presence of uncertain lifetimes and default. Without introducing exogenous debt constraints, agents are allowed to make collateral-backed promises at any state of their life span.