On the dimensionality of bounds generated by the Shapley–Folkman theorem

The Shapley–Folkman theorem places a scalar upper bound on the distance between a sum of non-convex sets and its convex hull. We observe that some information is lost when a vector is converted to a scalar to generate this bound and propose a simple normalization of the underlying space which mitigates this loss of information. As an example, we apply this result to the Anderson (1978) core convergence theorem, and demonstrate how our normalization leads to an intuitive, unitless upper bound on the discrepancy between an arbitrary core allocation and the corresponding competitive equilibrium allocation.     

House price convergence in the euro zone: A pairwise approach

The adoption of the euro common currency was expected to lead to convergence for a number of economic and financial variables across national borders, including house prices. We apply a probabilistic pairwise approach to the question of whether home values converge across eight euro zone housing markets. Contrary to previous studies, we find only marginal evidence that euro housing markets converge. Moreover, for what convergence there appears to be, there is no evidence that the adoption of the euro itself played a role in creating such convergence. Finally, Germany, the largest and most dominant economy of the currency union, is rarely found to be convergent with other nations.     

An analytical solution for the robust investment-reinsurance strategy with general utilities

In financial markets, different investors have different attitudes or preferences on the investment policies and reinsurance problems. For investors with different investment utilities, how to provide an optimal investment strategy is not only a very hard problem, but also an urgent problem to be solved. In this paper, we derive an analytical solution for the optimal allocation problem of investment-reinsurance with general-form utility function. The general utility function allows for varying relative risk aversion coefficient, which is an important feature in finance theory. However, obtaining analytical solutions for general utility function has been difficult or impossible. The solution presented in this paper is constructed through the homotopy analysis method (HAM) and written in the form of a Taylor series expansion. The fully nonlinear Hamilton–Jacobi–Bellman (HJB) equation is decomposed into an infinite series of linear PDEs, which can be solved analytically. In the end, three examples are presented to illustrate the convergence and accuracy of the method, it also demonstrates that different risk reference investors have different investment-reinsurance strategies.     

Potential socio-economic implications of future climate change and variability for Nigerien agriculture: A countrywide dynamic CGE-Microsimulation analysis

This study explores the potential economic and social effects induced by a possible future deterioration of weather conditions on Niger's agriculture. Our scenarios over a 25 year period rely on both long term climate change deterministic features and climate variability stochastic features which take into account a higher than normal frequency of severe droughts. Using a microsimulated Dynamic Recursive Computable General Equilibrium model, we show how a long run mean decrease in main crop yields could adversely affect growth, poverty and food security in the country and how more severe drought would worsen these negative effects. However, we also show that there would appear to be some room for manœuvre for coping strategies for Niger such as improving the rural road network, adopting modern crop varieties or, to a lesser extent, extending irrigation capacity.     

Subsidizing healthcare in the presence of market distortions

The paper develops a three-sector full-employment general equilibrium model for a small open developing economy with exogenous labour market imperfection and a non-traded sector providing healthcare services, the consumption of which generates positive externalities. Our main objective is to show that the optimal consumption subsidy to healthcare, if solely judged from the standpoint of economic growth, is strictly positive (zero) when the production technology of the healthcare sector is of the variable (fixed) coefficient type. However, in the variable coefficient case, the optimal per capita expenditure on healthcare crucially hinges on the degree of labour market imperfection and the quality of services provided by the healthcare sector. The latter result can possibly be considered as a theoretical justification why the magnitude of per capita public spending on healthcare services is significantly lower in the developing countries compared to that in the developed nations. Besides, using the Sen's (1974) index of social welfare that takes into consideration both the growth and income inequality aspects, we have proved that the optimal health subsidy is positive irrespective of the nature of production technology of the healthcare sector. Furthermore, most of these results are found to be valid even in the presence of Harris-Todaro type unemployment. Finally, the results lead to a few important policy implications in the context of the developing countries.     

A simple asset pricing model with heterogeneous agents,uninsurable labor income and limited stock market participation

In this paper we study a simple two-period asset pricing model to understand the implications of uninsurable labor income risk and/or borrowing constraints, limited stock market participation, heterogeneous labor income volatilities, and heterogeneous preferences. We appraise the performance of each of these in matching moments of asset returns to the data and show that limited stock market participation generates a significantly large equity premium. We also show that the distribution of wealth between stock market participants and non-participants plays an important role in asset pricing, and that the effect of borrowing constraints on asset returns are similar to that of limited participation. Finally, we discuss the practical implications of our investigation, providing an appraisal of ongoing changes in asset returns.     

Public assets and services delivery in South Africa: Is it really a success?

Poverty alleviation remains a pressing concern for South African policy-makers. Implementing effective anti-poverty policies requires a clear understanding of the nature and extent of poverty. The extant literature on South African poverty dynamics shows a decline in the headcount ratio over the first decade of the twenty-first century. However, the prior research largely adopts a narrow money-metric approach, or uses multi-dimensional indices that include welfare indicators based on private assets (e.g. television sets) or those that are provided publicly (e.g. access to water). This paper uses multiple correspondence analysis to measure non-income poverty trends for the period 2005–12. The novelty in this undertaking lies in an attempt to include a measure of the perceived quality of public assets and services to complement the standard indices. This provides some measure of ‘success’ of public service delivery, accounting for both changes in access and quality.     

GAAP,GFS and AASB 1049: perceptions of public sector stakeholders

Efforts by Australian standard‐setters to harmonise public sector financial reporting resulted in AASB 1049, which sought to bridge the divide between generally accepted accounting principles (GAAP)‐based and government finance statistics (GFS)‐based financial statements. However, whether AASB 1049 has resulted in information that is considered appropriate for the public sector has not been examined. We explore this issue by comparing the requirements of AASB 1049 with the responses from a survey of public sector stakeholders on the appropriate accounting treatment and presentation of selected financial items. The analysis suggests consensus with AASB 1049 on presentation issues but less consensus on accounting treatments.     

人民币升值对降低我国贸易顺差的作用分析——基于不同贸易方式的分析

本币升值是削减我国贸易顺差的一项措施。但是,在一般贸易和加工贸易同时存在且加工贸易占比更大的情况下,本币升值对削减顺差的作用将大大被削弱。本文探讨了在多种贸易方式同时存在的情况下本币升值对进出口的影响机制,证明了本币升值对不同贸易方式的影响程度不同并指出要有效削减贸易顺差必须特别采取针对加工贸易的措施。