Mathematical models for decision-making in planning drug abuse control programs

In this paper, a framework for systematizing the different applications of decision-making models to the control of drug abuse is first presented. Next, the available literature on the topic is used to exemplify as many as possible of the elements of the framework presented. Finally, extensions of the current state of the field in the direction of disaggregated and of dynamic models are presented.     

Taxes and Marriage: A Two‐Sided Search Analysis*

This article analyzes the effects of differential tax treatment of married and single individuals in the United States on marriage formation and composition, divorce, and labor supply. We develop a marriage‐market model with search frictions and heterogeneous agents that is sufficiently rich to capture key elements of the problem under consideration. We then calibrate the model and use it to evaluate the quantitative effects of several tax reforms aimed at making the tax law neutral with respect to marital status. We find that these reforms (i) systematically increase the labor supply of married females, with changes ranging from 0.3 to 10.1 percent; (ii) have substantial effects on the correlation of spouses’ incomes, which changes from 0.2 to values between 0.185 and 0.334; (iii) can lead to either an increase or decrease in the fraction of people married, with changes that range from ?0.6 to 2.4 percent.     

Household composition and food expenditures: a cross-country comparison

In the analysis of food expenditures, use of household member counts as an explanatory variable assumes each member has the same marginal food expenditure impact. In our analysis of Latin American food expenditures we reject this assumption via the estimation of endogenously determined adult equivalence scales that vary by household member gender and age. A series of hypothesis tests indicate significant differences not only in the male versus female equivalence scales but also across country. With the use of such equivalence scales in the definition of per capita expenditures we find significant differences in the distributions implying substantially different poverty rankings.     

The effects of globalization and technology on the elasticity of substitution

The elasticity of substitution between capital and labor (\(\sigma\)) is usually considered a “deep parameter”. This paper shows, in contrast, that \(\sigma\) is affected by both globalization and technology, and that different intensities in these drivers have different consequences for the OECD and the non-OECD economies. In the OECD, we find that the elasticity of substitution between capital and labor is below unity; that it increases along with the degree of globalization; but it decreases with the level of technology. Although results for the non-OECD area are more heterogeneous, we find that technology enhances the substitutability between capital and labor. We also find evidence of a non-significant impact of the capital-output ratio on the labor share irrespective of the degree of globalization (which would be consistent with an average aggregate Cobb–Douglas technology). Given the relevance of \(\sigma\) for economic growth and the functional distribution of income, the intertwined linkage among globalization, technology and the elasticity of substitution should be taken into account in any policy makers’ objective function.     

University Accounting Curricula: The Perceptions of an Alumni Group

Abstract

Many of the problems associated with accounting education could be due to at least two reasons: inadequate attention given to the design of accounting programmes, and the narrow view of stakeholder approach adopted in examining education issues. The existing literature mainly focuses on students' perception about issues such as teaching quality, alumni experience in major accounting firms, and so on. This paper deals with the design of accounting programmes, and proposes to ascertain the views of an important stakeholder group (i.e. alumni) on this issue. The findings of this study give credence to some of the generally held views, e.g. that it is no longer appropriate for tertiary education providers to adopt a one-size-fits-all approach. However, in some other areas, the findings represent a stark contrast to the views on certain issues promulgated by the professional bodies in New Zealand and overseas including the USA, (for example, the issue of appropriate proportions of accounting, business and liberal studies in an accounting programme). Notably, the respondents in general placed a low importance on auditing as part of an education programme. Further, in terms of the emphases that should be placed in an accounting programme, contrary to the endorsement in the literature, ‘work experience’ was not considered as important as other areas of emphasis, (e.g. global perspective, local perspective, professionalism and social and environmental perspective).     

Why do diplomas pay? An expanded Mincerian framework applied to Mexico

We compare four explanations for the value of diplomas, each of which has implications for unemployment and wage variation amongst graduates, most of which have not previously been tested for when seeking to explain the effects of diplomas. We test for these implications using a refined econometric framework, exploiting idiosyncrasies in Mexican labour market and educational institutions. Premiums in Mexico appear to result from diplomas tied to jobs with downwards rigid wages?–?an uncommon but simple explanation. The standard explanations, including screening, are not suggested by Mexican data. Our results illuminate how labour markets segmented by diplomas clear. This depends upon the nature of the labour market rigidities exactly as predicted by neoclassical theory.     

Analysis of electricity prices for Central American countries using dynamic conditional score models

In this paper, we compare the performance of dynamic conditional score (DCS) and standard financial time-series models for Central American energy prices. We extend the Student’s t and the exponential generalised beta distribution of the second kind stochastic location and stochastic seasonal DCS models. We consider the generalised t distribution as an alternative for the error term and also consider dynamic specifications of volatility. We use a unique dataset of spot electricity prices for El Salvador, Guatemala and Panama. We consider two data windows for each country, which are defined with respect to the liberalisation and development process of the energy market in Central America. We study the identification of a wide range of DCS specifications, likelihood-based model performance, time-series components of energy prices, maximum likelihood parameter estimates, the discounting property of conditional score, and out-of-sample forecast performance. Our main results are the following. (i) We determine the most robust models of energy prices, with respect to parameter identification, from a wide range of DCS specifications. (ii) For most of the cases, the in-sample statistical performance of DCS is superior to that of the standard model. (iii) For El Salvador and Panama, the standard model provides better point forecasts than DCS, and for Guatemala the point forecast precision of standard and DCS models does not differ significantly. (iv) For El Salvador, the standard model provides better density forecasts than DCS, and for Guatemala and Panama, the density forecast precision of standard and DCS models does not differ significantly.     

Inflation analysis in the Central American Monetary Council

Though not working toward an imminent transition to a monetary or currency union, the Central American Monetary Council (or CMCA, from Spanish Consejo Monetario Centroamericano) serves as an institution promoting economic and financial stability among five Central American countries (Costa Rica, El Salvador, Guatemala, Honduras and Nicaragua) and the Dominican Republic. Econometric studies conducted by researchers from CMCA have mostly focused on studying inflation levels of these countries, making use of econometric tools such as VECM and cointegration. We expand the study of inflation stability in the member countries of the CMCA by adopting a long memory and fractionally integrated approach and implementing cointegration methods that have not yet been used in the study of the Central American Monetary Council. Our results first show that all the series of prices are nonstationary, with orders of integration equal to or higher than 1 in all cases. Looking at long-run equilibrium relationships among the countries, we only found strong evidence of a cointegration relationship in the case of Honduras with El Salvador. All the other vis-a-vis relationships seem to diverge in the long run. Policy implications of the results obtained are also derived in the paper.