Models of Quality‐Adjusted Life Years when Health Varies Over Time: Survey and Analysis

Abstract.  Quality‐adjusted life year (QALY) models are widely used for economic evaluation in the health care sector. In the first part of the paper, we establish an overview of QALY models where health varies over time and provide a theoretical analysis of model identification and parameter estimation from time trade‐off (TTO) and standard gamble (SG) scores. We investigate deterministic and probabilistic models and consider five different families of discounting functions in all. The second part of the paper discusses four issues recurrently debated in the literature. This discussion includes questioning the SG method as the gold standard for estimation of the health state index, re‐examining the role of the constant‐proportional trade‐off condition, revisiting the problem of double discounting of QALYs, and suggesting that it is not a matter of choosing between TTO and SG procedures as the combination of these two can be used to disentangle risk aversion from discounting. We find that caution must be taken when drawing conclusions from models with chronic health states to situations where health varies over time. One notable difference is that in the former case, risk aversion may be indistinguishable from discounting.     

Nonlinearity, ComputationaL Complexity and Macroeconomic Modelling

In this paper we survey and appraise the main contributions to solving and stabilising non‐linear equation systems typically found in Economics. We are keen wherever possible to draw distinctions and limiting cases between different solution methods, define acceleration strategies and encourage the use of hybrid or switching algorithms. Both large‐scale traditional macroeconomic models as well as smaller non‐linear analytical models are considered.     

A Meta‐Analysis of β‐Convergence: the Legendary 2%

Abstract.  The topic of convergence is at the heart of a wide‐ranging debate in the growth literature, and empirical studies of convergence differ widely in their theoretical backgrounds, empirical specifications, and in their treatment of cross‐sectional heterogeneity. Despite these differences, a rate of convergence of about 2% has been found under a variety of different conditions, resulting in the widespread belief that the rate of convergence is a natural constant. We use meta‐analysis to investigate whether there is substance to the 'myth' of the 2% convergence rate and to assess several unresolved issues of interpretation and estimation. Our data set contains approximately 600 estimates taken from a random sample of empirical growth studies published in peer‐reviewed journals. The results indicate that it is misleading to speak of a natural convergence rate since estimates of different growth regressions come from different populations, and we find that correcting for the bias resulting from unobserved heterogeneity in technology levels leads to higher estimates of the rate of convergence. We also find that correcting for endogeneity of the explanatory variables has a substantial effect on the estimates and that measures of financial and fiscal development are important determinants of long‐run differences in per capita income levels. We show that although the odds of a study being published is not uniform for studies with different p ‐values, publication bias has no significant effect on the conclusions of the analysis.     

A Meta‐Analysis of the International Gender Wage Gap

Abstract.  Since the early 1970s, a number of authors have calculated gender wage differentials between women and men of equal productivity. This meta‐study provides a new quantitative review of this vast amount of empirical literature on gender wage differentials as it concerns not only differences in methodology, data, and time periods, but also different countries. We place particular emphasis on a proper consideration of the quality of the underlying study which is done by a weighting with quality indicators. The results show that data restrictions – i.e. the limitation of the analysis to new entrants, never‐marrieds, or one narrow occupation only – have the biggest impact on the resulting gender wage gap. Moreover, we are able to show what effect a misspecification of the underlying wage equation – like the frequent use of potential experience – has on the calculated gender wage gap. Over time, raw wage differentials worldwide have fallen substantially; however, most of this decrease is due to better labor market endowments of females.     

A microeconometric evaluation of rehabilitation of long‐term sickness in Sweden

In this study the effects of various types of rehabilitation programmes on labour market outcomes are estimated. A main feature of this study is that it jointly evaluates multiple treatments by nonparametric matching estimators. The study is based on a large sample of persons in western Sweden who are long‐term sick and could participate in rehabilitation programmes. Our results suggest that workplace training is superior to the other rehabilitation programmes with respect to labour market outcomes, but compared to non‐participation no positive effects are found. Copyright © 2004 John Wiley & Sons, Ltd.     

Testing for Linearity

The problem of testing for linearity and the number of regimes in the context of self‐exciting threshold autoregressive (SETAR) models is reviewed. We describe least‐squares methods of estimation and inference. The primary complication is that the testing problem is non‐standard, due to the presence of parameters which are only defined under the alternative, so the asymptotic distribution of the test statistics is non‐standard. Simulation methods to calculate asymptotic and bootstrap distributions are presented. As the sampling distributions are quite sensitive to conditional heteroskedasticity in the error, careful modeling of the conditional variance is necessary for accurate inference on the conditional mean. We illustrate these methods with two applications — annual sunspot means and monthly U.S. industrial production. We find that annual sunspots and monthly industrial production are SETAR(2) processes.     

Beyond Publication Bias

Abstract.  This review considers several meta‐regression and graphical methods that can differentiate genuine empirical effect from publication bias. Publication selection exists when editors, reviewers, or researchers have a preference for statistically significant results. Because all areas of empirical research are susceptible to publication selection, any average or tally of significant/insignificant studies is likely to be biased and potentially misleading. Meta‐regression analysis can see through the murk of random sampling error and selected misspecification bias to identify the underlying statistical structures that characterize genuine empirical effect. Meta‐significance testing and precision‐effect testing (PET) are offered as a means to identify empirical effect beyond publication bias and are applied to four areas of empirical economics research – minimum wage effects, union‐productivity effects, price elasticities, and tests of the natural rate hypothesis.     

Economic Efficiency and Frontier Techniques

Abstract. Most of the literature related to the measurement of economic efficiency has based its analysis either on parametric or on non‐parametric frontier methods. The choice of estimation method has been an issue of debate, with some researchers preferring the parametric and others the non‐parametric approach. The aim of this paper is to provide a critical and detailed review of both core frontier methods. In our opinion, no approach is strictly preferable to any other. Moreover, a careful consideration of their main advantages and disadvantages, of the data set utilized, and of the intrinsic characteristics of the framework under analysis will help us in the correct implementation of these techniques. Recent developments in frontier techniques and economic efficiency measurement such as Bayesian techniques, bootstrapping, duality theory and the analysis of sampling asymptotic properties are also considered in this paper.     

Publication Bias in the Economic Freedom and Economic Growth Literature

Abstract.  The impact of institutions on economic performance has attracted significant attention from researchers, as well as from policy reformers. A rapidly growing area in this literature is the impact of economic freedom on economic growth. The aim of this paper was to explore publication bias in this literature by means of traditional funnel plots, meta‐significance testing, as well as by bootstrapping these meta‐significance tests. When all the available estimates are combined and averaged, there seems to be evidence of a genuine and positive economic freedom – economic growth effect. However, it is also shown that the economic freedom – economic growth literature is tainted strongly with publication bias. The existence of publication bias makes it difficult to identify the magnitude of the genuine effect of economic freedom on economic growth. The paper explores the differences between aggregate and disaggregate measures of economic freedom and shows that selection effects are stronger when aggregate measures are used.     

The Desirability of In‐kind Transfers in the Presence of Distortionary Taxes

A standard argument in welfare economics maintains that private goods should not be publicly provided, because cash transfers are always superior to in‐kind transfers. However, this conclusion does not hold in second best economies. A strong case for the desirability of in‐kind transfer in the presence of distortionary taxes has been made in various recent contributions. Here, we survey the arguments provided in these papers, using a common theoretical framework which enables us to present more clearly the similarities and the differences among the various papers. The use of a common formal model helps us to show how the rationale for public provision of private goods is sensitive to the form of the tax system. It also helps us to provide an explanation why mandatory and non‐mandatory in‐kind transfer schemes have the same effects on social welfare. Finally, we offer some considerations on the relevance of the theory of in‐kind transfers for policy action. JEL Classification Number: H42     

The Last Word on the Wage Curve?

Abstract.  Since 1990, there has been extensive international research on the responsiveness of wages of individuals to changing local labour market conditions. For many countries, an inverse relationship between wages and local unemployment rates has been found. In their book, The Wage Curve , Blanchflower and Oswald argued that the unemployment elasticity of pay is around −0.1 in most countries. In a 1995 literature survey, Card referred to this striking empirical regularity as being close to an 'empirical law of economics'. Nonetheless, reported elasticities do vary, even excluding outliers, between about −0.5 and +0.1. There is also considerable heterogeneity among wage curve studies in terms of data and model specification. This paper carries out meta‐analytic techniques on a sample of 208 elasticities derived from the literature to uncover the reasons for the differences in empirical results across studies. Several causes of variation are identified. There is also clear evidence of downward publication bias. In addition, many reported t ‐statistics are biased upwards due to the use of aggregate unemployment rates. A maximum likelihood method and a trimming procedure are used to correct for these biases. Both methods give similar results for our sample. An unbiased estimate of the wage curve elasticity at the means of study characteristics is about −0.07.     

Games Economists Play: A Survey of Non‐Computerized Classroom‐Games for College Economics

The bulk of this unusual paper consists of an extensive online annotated compilation of 113 non‐computerized classroom‐games, most of which can be played within one class period, to assist in the teaching of college‐level basic micro and macroeconomic concepts (see http://www.aug.edu/~sbajmb or http://www.marietta.edu/~delemeeg ).
The paper itself consists of three major sections. The first catalogues, summarizes, and provides sample annotations of the games we collected. Section two makes a number of observations about the games. For instance, we notice an imbalance between games for microeconomics (many) and games for macroeconomics (few). We also detail which standard introductory economics topics are covered well and which are not covered well or missing altogether. For example, we observe that few games exist to present the proper economic role of government in economic affairs. The third section surveys the available literature on the costs and benefits of playing games in the classroom. In particular, our survey reveals that existing studies consider costs and benefits to students and instructors only partially, and we lay out a matrix that should help in the design of improved studies on the efficacy of gaming in the classroom.     

Meta‐Regression Analysis: A Quantitative Method of Literature Surveys

Abstract.  Pedagogically, literature reviews are instrumental. They summarize the large literature written on a particular topic, give coherence to the complex, often disparate, views expressed about an issue, and serve as a springboard for new ideas. However, literature surveys rarely establish anything approximating unanimous consensus. Ironically, this is just as true for the empirical economic literature. To harmonize this dissonance, we offer a quantitative methodology for reviewing the empirical economic literature. Meta‐regression analysis (MRA) is the regression analysis of regression analyses. MRA tends to objectify the review process. It studies the processes that produce empirical economic results as though they were any other social scientific phenomenon. MRA provides a framework for replication and offers a sensitivity analysis for model specification. In this brief essay, we propose a new method of reviewing economic literature, MRA, and discuss its potential.     

PRIVATIZED HOUSING AND THE DEVELOPMENT OF CONDOMINIUMS IN CENTRAL AND EASTERN EUROPE: THE CASES OF POLAND, HUNGARY, SLOVAKIA, AND ROMANIA

This paper looks at the housing sector reform in Central and Eastern Europe and examines the progress to date in housing privatization and policies aimed at improving the management and condition of the existing housing stock through the establishment and operation of the condominium form of ownership. The paper compares and analyzes approaches taken in four countries with regard to four issues: (I) the legal framework and implementation strategies; (2) the role of local government housing strategies in supporting the development of viable condominium associations; (3) property management of privatized housing; and (4) financing rehabilitation and capital repair projects for condominiums. Findings include the need for a clear legal framework, competition in the property management market, more supportive local government policies, and public sector support in tackling rehabilitation finance issues.     

Historicizing Planning,Problematizing Participation

In this article, I offer speculations which share the intentions of this symposium to bring to light seldom acknowledged configurations of knowledges, and to indicate different ways of thinking historically about urban problems and planning policies. I suggest that a genealogical or critical historical sensibility has much to contribute to these projects by tracing how policies and programmes come into being in response to specific conditions and within specific sets of presuppositions, and are rarely the products of unified histories or singular rationalities. But these policies are also configured in discursive terrains that already shape the form of problems and their possible solutions. That is, before policies or concepts can ‘travel’, they have to come into being under certain ‘conditions of possibility’. The main focus of this article is to suggest that posing a policy, programme or set of practices as a ‘problematization’ as a consequence of certain conditions of possibility can productively indicate different avenues of enquiry that trace the disparate ‘pre‐travel’ emergences of what may (or may not) then become ‘travelling’ policies. I indicate some questions and possible research directions arising from taking participation in planning as a particular form of problematization and calling attention to the taken‐for‐granted nature of ‘participation’ as it is theorized and practised in the fields of urban planning and participatory development.     

陕西地市高职院校青年教师培养工作的研究与实践

青年教师队伍是高职院校教师队伍的一支重要的后备军和生力军。文章以咸阳职业技术学院为例,分析了陕西地市高职院校青年教师培养工作现状,指出了主要问题,提出了加强和改进青年教师培养工作的主要策略。     

An integrative framework for understanding cross-national human resource management practices

Currently, debate in the area of cross-national human resource management (HRM) suggests that both “culture-bound” and “culture-free” factors and variables are important determinants of HRM policies and practices. HRM is presented as being context-specific and it is argued that with the growth of new markets world-wide, and increased levels of competition and globalization of business, there is a strong need for more cross-national HRM studies. However, the literature shows the absence of an integrated framework, which can help to highlight the different role that context-specific facets of HRM practices play. The nature of different determinants in different national and regional settings is rarely analyzed. This paper develops an integrated framework. It delineates the main distinctive facets associated with national factors, contingent variables, and organizational and human resource (HR) strategies and policies, that may be used to evaluate cross-national comparative HRM policies and practices.     

An Exegesis on Currency and Banking Crises

Abstract.  This paper reviews the literature on currency and banking crises. Currency and banking crises are characterized according to some standards in the literature and their historical record summarized. The development of the literature from first through fourth‐generation, or so‐called 'institutional' models is reviewed. A digression on institutions is provided along with some sidebars on the development of the literature on institutions as it relates to economic growth. The empirical research on third‐generation (or twin crises) models and on institutional models of currency and banking crises, which are so far scarce, is covered too. A summary of the main policy issues for dealing with financial crises is presented. The paper closes with an emphasis on institutions and a call for more research directed at institutions and their role in the financial system.     

A Meta‐Analytic Assessment of the Effect of Immigration on Wages

Abstract.  In our increasingly interconnected and open world, international migration is becoming an important socioeconomic phenomenon for many countries. Since the early 1980s, many studies about the impact of immigration on host labour markets have been undertaken. Borjas (2003 , The labor demand curve is downward sloping: reexamining the impact of immigration on the labor market. Quarterly Journal of Economics 118(4): 1335–1374) noted that the estimated effect of immigration on the wage of native workers varies widely from study to study and sometimes even within the same study. In addition, these effects cluster around zero. Such a small effect is a rather surprising outcome, given that in a closed competitive labour market an increase in labour supply may be expected to exert a downward pressure on wages. We revisit this issue by applying meta‐analytic techniques to a set of 18 papers, which altogether generated 348 estimates of the percentage change in the wage of a native worker with respect to a 1 percentage point increase in the ratio of immigrants over native workers. While many studies in our database employ US data, estimates are also obtained from Germany, The Netherlands, France, Norway, Austria, Israel and Australia. Our analysis shows that results vary across countries and are inter alia related to the type of modelling approach. Technical issues such as publication bias and quality of the estimates are addressed as well.     

Supporting decision-making for recycling-based investments

The increasing demand for environmentally friendly products and the introduction of tougher environmental laws have encouraged firms to consider the adoption of recycling issues as one of the most effective solutions for reducing their impact on the environment. Unfortunately, many companies delegate decision-making on recycling issues at an operational level. This attitude presents some problems as it could lead companies to neglect many effects resulting from the adoption of recycling-based investments. The objective of this paper is to suggest a conceptual model aimed at supporting managers in the integration of recycling issues into the overall process of strategy formation; in particular, the designed approach is divided into two main phases: the identification of the main recycling-based programmes and the definition of a framework, based on both physical and accounting measures, aimed at assessing the effectiveness of different recycling initiatives according to the main priorities of the decision-maker.