Economic Theory and Econometric Practice: Parametric Efficiency Analysis

Parametric efficiency analysis is one of the most investigated areas in applied production economics. Nevertheless, the vast majority of empirical studies are not accompanied by a thorough theoretical interpretation of the underlying functional form and the obtained estimates. The robustness of policy suggestions based on inferences from efficiency measures nevertheless crucially depends on theoretically well-founded estimates. This research contribution adresses parametric efficiency measurement by critically reviewing the theoretical consistency of recently published technical efficiency estimates. The theoretical concerns are verified by empirical applications confirming the need for a posteriori checking the regularity of the estimated frontier by the researcher and, if necessary, the a priori imposition of the theoretical requirements. Bootstrapping based stochastic simulations of a simple parametric efficiency model by using different flexible functional forms confirmed the severeness of the theoretical concerns especially with respect to the merely locally restrictable translog specification.     

Simultaneous inter- and intra-group conflicts

This paper models the trade-off between production and appropriation in the presence of simultaneous inter- and intra-group conflicts. The model exhibits a ‘group cohesion effect’: if the contest between the groups becomes more decisive, the players devote fewer resources to the intra-group conflict. Moreover, there is also a ‘reversed group cohesion effect’: if the intra-group contests become less decisive, the players devote more resources to the inter-group contest. The model also sheds new light on normative questions. I derive exact conditions for when dividing individuals into more groups leads to more productive and less appropriative activities. Moreover, I show that there is an optimal size of the organization which is determined by a trade-off between increasing returns to scale in production and increasing costs of appropriative activities. I want to thank Paul Heidhues, Kai Konrad, Thomas Kittsteiner, Klaas Staal, an anonymous referee, and in particular Dan Kovenock for very helpful comments and suggestions. Any remaining errors are mine. Financial support from the Deutsche Forschungsgemeinschaft through SFB/TR 15 is gratefully acknowledged.     

Equilibrium returns with transaction costs

We study how trading costs are reflected in equilibrium returns. To this end, we develop a tractable continuous-time risk-sharing model, where heterogeneous mean–variance investors trade subject to a quadratic transaction cost. The corresponding equilibrium is characterized as the unique solution of a system of coupled but linear forward–backward stochastic differential equations. Explicit solutions are obtained in a number of concrete settings. The sluggishness of the frictional portfolios makes the corresponding equilibrium returns mean-reverting. Compared to the frictionless case, expected returns are higher if the more risk-averse agents are net sellers or if the asset supply expands over time.     

A Relational Typology of Project Management Offices

This explorative article develops a relational typology of PMOs based on their roles with stakeholders. A multi‐case study was used to identify the roles of PMOs in multiple‐PMO settings. A three‐dimensional role space allows locating the complex relational profiles that PMOs take on with respect to their stakeholders in practice. Superordinate, subordinate, and coequal roles were identified in a framework of servicing, controlling, and partnering in organizations. While servicing (subordinate role profile) and controlling (superordinate role profile) support organizational effectiveness and exploitation of knowledge, partnering (coequal role profile) creates the slack necessary for potential exploration of new knowledge.     

Human resource management in Asian subsidiaries: comparison of French and Japanese MNCs

European and Japanese multinational corporations (MNCs) have expanded their activities in Asia, usually through massive mobilization of various human resources from head offices, whether expatriated or on short-term assignments, and a reliance on diverse categories of local employees. Because expatriation is costly, difficult and often limited in its results, MNCs have developed localization strategies for management positions to support their regional development. This contribution addresses such a scenario by comparing Japanese and French MNCs in eight Asian countries, based on 53 interviews across subsidiaries of 17 MNCs. We find that Japanese MNCs have not localized management positions as much as French MNCs, but they have grown more willing to do so. To compensate for the lack of local capabilities without sending more expatriates, both French and Japanese MNCs frequently send experts on short-term assignments. Finally, though human resource practices vary widely across countries, even for a given MNC, some harmonizing principles have been introduced to regional HRM strategies recently.     

Public health insurance,individual health,and entry into self-employment

We investigate the impact of a differential treatment of paid employees versus self-employed workers in a public health insurance system on the entry rate into self-employment. Health insurance systems that distinguish between the two sectors of employment create incentives or disincentives to start a business for different individuals. We estimate a discrete time hazard rate model of entry into self-employment based on representative household panel data for Germany, which include individual health information. The results indicate that an increase in the health insurance cost differential between self-employed workers and paid employees by €10 per month decreases the probability of entry into self-employment by 1.7% of the annual entry rate. This shows that entrepreneurship lock, which an emerging literature describes for the system of employer-provided health insurance in the USA, can also occur in a public health insurance system. Therefore, entrepreneurial activity should be taken into account when discussing potential health-care reforms.     

ROBUST PORTFOLIOS AND WEAK INCENTIVES IN LONG‐RUN INVESTMENTS

When the planning horizon is long, and the safe asset grows indefinitely, isoelastic portfolios are nearly optimal for investors who are close to isoelastic for high wealth, and not too risk averse for low wealth. We prove this result in a general arbitrage‐free, frictionless, semimartingale model. As a consequence, optimal portfolios are robust to the perturbations in preferences induced by common option compensation schemes, and such incentives are weaker when their horizon is longer. Robust option incentives are possible, but require several, arbitrarily large exercise prices, and are not always convex.     

The Success of the Nordic Countries as a Blueprint for Small Open Economies

To retain their leading position, the Nordics must invest in developing more sophisticated products than competing economies like Turkey. This applies to all complex economies, but constitutes a greater challenge to the Nordic countries with their comparatively small populations.     

International strategy’s effects on retailers’ local implementation and performance

Retailers dynamically expand abroad and strategically seek local performance because their business is local. However, knowledge of the contribution of retail firms’ international strategies to subsidiaries’ local performance is limited. Based on the prominent I/R strategy framework, the authors conceptualize integration/responsiveness as the transfer/local generation of firm-specific advantages and analyze (direct and indirect) paths of varying degrees of I/R via local implementation decisions to performance. Because retailers’ firm-specific advantages have a limited geographic reach, different successful paths are expected in close and distant countries. Empirically, a survey based on face-to-face-interviews with 126 retail CEOs and expansion managers, partial least squares structural equation modelling and bootstrapping-based mediation analyses were conducted. The results reveal only indirect paths of international strategy to local performance through local standardization/centralization. Unique insights into the paths of firm? strategy to subsidiary performance emerge, such as important tradeoffs between superior paths in close countries.