Testing for time-invariant unobserved heterogeneity in generalized linear models for panel data

Recent literature on panel data emphasizes the importance of accounting for time-varying unobservable individual effects, which may stem from either omitted individual characteristics or macro-level shocks that affect each individual unit differently. In this paper, we propose a simple specification test of the null hypothesis that the individual effects are time-invariant against the alternative that they are time-varying. Our test is an application of Hausman (1978) testing procedure and can be used for any generalized linear model for panel data that admits a sufficient statistic for the individual effect. This is a wide class of models which includes the Gaussian linear model and a variety of nonlinear models typically employed for discrete or categorical outcomes. The basic idea of the test is to compare two alternative estimators of the model parameters based on two different formulations of the conditional maximum likelihood method. Our approach does not require assumptions on the distribution of unobserved heterogeneity, nor it requires the latter to be independent of the regressors in the model. We investigate the finite sample properties of the test through a set of Monte Carlo experiments. Our results show that the test performs well, with small size distortions and good power properties. We use a health economics example based on data from the Health and Retirement Study to illustrate the proposed test.     

SMEs and CSR Theory: Evidence and Implications from an Italian Perspective

This paper reviews the development of socially responsible investment (SRI) in the Spanish financial market. The year, 1997 saw the appearance in Spain of the first SRI mutual fund, but it was not until late 1999, that major Spanish fund managers offered SRI mutual funds on the retail market. The development of SRI in the Spanish financial market has not experienced the high levels of development seen in other European countries, such as France or Italy, where interest in SRI began during the same period. This paper presents an analysis of the impact of SRI mutual funds managed by Spanish fund managers comparing the evolution of managed assets and number of investors. We also analyse the investment strategies adopted by these funds, which mainly use negative screening criteria and the participation of non-governmental organisations as institutional investors. An analysis of the take up of socially responsible investment in the Spanish financial market shows majors deficits in this process. This is due to Spanish investors having limited sensitivity to social issues and knowledge of SRI, and a lack of development of SRI investment strategies, such as engagement or shareholder activism by fund managers. Furthermore, the take-up of SRI mutual funds in the Spanish financial market coincided with a fall in the stock market at the beginning of the 21st Century. We conclude with an analysis of the relationship between SRI and Corporate Social Responsibility (CSR).Josep M. Lozano is currently Professor in the Department of Social Sciences at ESADE, Universidad Ramon Llul-URL and Director of the school’s Institute for the Individual, Corporations and Society (IPES). Co-founder of ética, Economía y Dirección (Spanish branch of the European Business Ethics Network), member of the international Editorial Board of ‚Ethical Perspectives’ and member of the Business Ethics inter-faculty group of the Community of European Management Schools (CEMS). He has been a highly-commended runner-up in the European division of the Beyond Grey Pinstripes Faculty Pioneer Award. Author of Ethics and Organizations. Understanding Business Ethics as a Learning Process. Dordrecht: Kluwer, 2000.Laura Albareda is a Researcher at the Institute for the Individual, Corporations and Society (IPES), ESADE, Universidad Ramon Llull-URL. She is manager of the Observatory on Ethical, Ecological and Social Investment funds in Spain, an annual IPES publication on Socially Responsible Investment in Spain. Fields of research and academic interest are Corporate Social Responsibility, Business Ethics, Global Governance, Governments and Public Policies on CSR and Socially Responsible Investment.M. Rosario Balaguer is a Lecturer in the Department of Finance and Accounting at Universitat Jaume I. Research areas focus on finance-based analysis of Corporate Social Responsibility and Socially Responsible Investment, covering issues such as profitability, risk and performance. She has taken part in several national and international conferences and published a number of articles in this field.     

Verti-zontal differentiation in export markets

Many trade models of monopolistic competition identify cost efficiency as the main determinant of firm performance in export markets. To date, the analysis of demand factors has received much less attention. We propose a new model where consumer preferences are asymmetric across varieties and heterogeneous across countries. The model generates new predictions and allows for an identification of horizontal differentiation (taste) clearly distinguished from vertical differentiation (quality). Data patterns observed in Belgian firm–product level exports by destination are congruent with the predictions and seem to warrant a richer modelling of consumer demand.     

Inequality and Europe 2020

The European Commission put forward its strategy for the 2010–2020 period in its Europe 2020 Communication. Inequality should be seen as a cornerstone of both sustainable and inclusive growth. In fact, unequal societies are also more unstable societies (i.e. unsustainable) and more polarised (i.e. exclusive). The analysis of available data and the established consensus in the literature shows four main stylised facts.     

Parents’ performance in entrepreneurship as a “double-edged sword” for the intergenerational transmission of entrepreneurship

We investigate how perceived parents’ performance in entrepreneurship (PPE) affects the entrepreneurial career intentions of offspring. We argue that while perceived PPE enhances offspring’s perceived entrepreneurial desirability and feasibility because of exposure mechanisms, it inhibits the translation of both desirability and feasibility perceptions into entrepreneurial career intentions due to upward social comparison mechanisms. Thus, perceived PPE acts as a double-edged sword for the intergenerational transmission of entrepreneurship. Our predictions are tested and confirmed on a sample of 21,895 individuals from 33 countries. This study advances the literature on intergenerational transmission of entrepreneurship by providing a foundation for understanding the social psychological conditions necessary for such transmission to occur.     

Competition,firm size and returns to skills: Evidence from currency shocks and market liberalisations

We investigate the impact of product market competition on returns to skills in Italy using a longitudinal dataset on individual working histories. This impact is identified using three exogenous shocks affecting competition: the unforeseen devaluation of the Lira in 1992, its return to a fixed exchange regime in 1996 and the market liberalisation in the utility and transport sectors in the late 1990s–early 2000s. We analyse how firm heterogeneity and shocks of different types and signs affect the impact of competition on skill premia. We find that opposite shocks have opposite effects: an increase (resp. decrease) in international competition increases (resp. decreases) skill premia. Moreover, international shocks have greater effects on medium sized firms, while domestic liberalisation shocks have greater effects on large incumbents.     

Turbulence effects on dust explosion venting

The ability to estimate the intensity of accidental dust explosions is an essential prerequisite of methodologies intended to provide design guidelines for the protection of equipment and buildings where combustible dusts are being handled. In general, the severity of an explosion depends on the type of dust involved, its physical properties (such as particle size and moisture content), the characteristics of the interested volume (size, shape, presence of vents, and blockages), the strength and type of the ignition source, and the conditions of the environment (air flow, turbulence).     

Non‐Reciprocal Trade Preferences and the Role of Compliance Costs in the Agricultural Sector: Exports to the EU

We investigate whether non‐reciprocal preferential regimes granted by the European Union have an impact on agricultural export flows from beneficiary countries while accounting for the costs of compliance that may prevent exporters from taking full advantage of potential benefits. Compliance costs are heterogeneous and difficult to measure. We proxy their influence and specify a model that allows for a different preferential margin impact according to the proxy costs. Adopting the gravity framework and using a sample of 554 lines of agricultural products for 131 developing countries in 2002, we find that the costs of compliance play a role in making the schemes work: the lower the costs, the greater the impact of the preferential margins. Moreover, the estimated margin effect differs between different regimes.     

Money secrets: How does trade secret legal protection affect firm market value? Evidence from the uniform trade secret act

Research summary : We investigate the impact of trade secret legal protection on firm market value in the context of acquisitions. On one hand, market value may increase because trade secret assets become better protected from rivals. On the other hand, market value may decrease because trade secret protection reduces information about the target and its competitors available to potential buyers, increasing uncertainty about its value. Buyers will discount their offers in expectation of being compensated for riskier deals. Using a sample of private equity investments in the United States, we find that trade secret protection has a positive effect in industries with high mobility of knowledge workers, but a negative effect in industries with (1) high resource–value uncertainty and (2) high poor‐investment risk. Managerial summary : We argue that an increase in trade secret legal protection might not unequivocally benefit firm owners when selling their business. A stronger trade secret protection increases the market value of firms in industries with high workers' mobility, but it decreases the market value of firms in industries with uncertain resource value and/or high risk of poor‐acquisition investments. Based on the contingent effect of trade secret protection, companies may want to adjust their strategic decisions, including where to locate or relocate, based in part on whether they will derive benefits or suffer losses when trade secrets are better protected. Finally, our study should help policymakers understand more fully the economic impact of government policies associated with trade secrets. Copyright © 2016 John Wiley & Sons, Ltd.