A comparison of approximately optimal stratification given proportional allocation with other methods of stratification and allocation

Summary In this article, we shall present an approximately optimal method for constructing stratum boundary points when the sample is allocated proportionally. The method is based on an equal partitioning of the cumulative off ^1/3, wheref is the distribution of the stratification variable. We show that in many practical situations this technique compares favourably with approximately optimal stratification and allocation methods previously suggested.

---

Zusammenfassung In diesem Artikel stellen wir eine annähernd optimale Methode zur Festlegung von Stratabegrenzungspunkten dar, die für proportional angeordnete Samples gilt. Die Methode basiert auf einer gleichen Einteilung derf ^1/3-Kummulation, wobeif die Verteilung der Stratifikations-variablen darstellt. Wir zeigen, daß diese Technik in vielen praktischen Fällen gegenüber den bisher vorgeschlagenen Methoden zur optimalen Stratifikation und Zuordnung nicht schlecht abschneidet.

     

Information and Investor Behavior Surrounding Earnings Announcements

The goal of this paper is to analyze the impact of annual earnings announcements on the market through the order flow data in addition to the usual transaction data. In this respect, examining order flow data can potentially reveal valuable information that is not available from transaction data. In fact, the data allow us to test hypotheses about asymmetric information and investor behavior and to test if the behavior varies with investor sophistication. In addition, the paper tries to identify the determinants of the impact on a firm's value using assumptions about investor behavior.     

WIC Participation and Relative Quality of Household Food Purchases: Evidence from FoodAPS

We examine the effect of the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) on the quality of household food purchases using the National Household Food Acquisition and Purchase Survey (FoodAPS) and propensity score matching. A healthy purchasing index (HPI) is used to measure nutritional quality of household food purchases. WIC foods explain the improvement in quality of food purchases, not self‐selection of more nutrition‐conscious households into the program. The improvement in purchase quality was driven entirely by WIC participating households who redeemed WIC foods during the interview week. There was no significant difference between WIC participants who did not redeem WIC foods and eligible nonparticipants. In this sample, there is no evidence that lack of access to clinics has adverse effects on participation nor is there evidence that HPI depends on supermarket access. A supervised machine learning process supports our main conclusion on the importance of WIC foods.     

How do the employment effects of job creation schemes differ with respect to the foregoing unemployment duration?

Based on new administrative data for Germany covering entrances into job creation schemes between July 2000 and May 2001, we evaluate the effects of this active labour market policy programme considering the timing of treatment in the individual unemployment spell. Applying propensity score matching in a dynamic setting where the time until treatment in the unemployment spell is stratified into quarters, regional (East and West Germany) as well as gender differences are considered in the estimation. The results in terms of employment present a heterogeneous, but disappointing picture. For West Germany, most of the estimates are insignificant at the end of the observation period, and only one positive exception could be established. In East Germany, none of the groups experiences an improvement of the labour market situation, but the employment chances tend to be reduced due to participation even 30 months after start of programmes.     

Investigating CSR communication in SMEs: a case study among Danish middle managers

This paper seeks to analyse small‐ and medium‐sized enterprise (SME) managers' representations of corporate social responsibility (CSR) and CSR communication in a corporate communication perspective. The basic question is: how strategic is CSR communication in SMEs? Corporate communication and CSR theories are used to establish an ideal typology of CSR concepts informing an analysis of qualitative data in the form of interviews with three middle managers in two Danish SMEs. A CSR communication model published earlier by the authors is challenged from a SME perspective. Results from an Internet‐based questionnaire survey of 1071 SMEs pave the way for the analysis. Our analysis shows that SME managers clearly have an inside‐out approach to CSR, with a strong emphasis on the internal (corporate culture) dimension. However, SMEs and/or SME managers tend not to communicate externally about the CSR activities of the company. Based on these findings, the paper argues that CSR communication in SMEs is challenged by the global economy and is under revision. The contribution of the paper is to provide an insight into SMEs' present stage in relation to a possible future approach to strategic CSR communication. The paper also reminds us that SMEs have no interest in turning their local and authentic practice into a forced marketing and branding exercise, leaving them with an artificial picture of who they are and strive to be in the future. They should keep on acting locally but force themselves to think globally.     

Market Incentives for Safe Foods: An Examination of Shareholder Losses from Meat and Poultry Recalls

Meat and poultry recalls, while voluntary, are carried out under governmental oversight. If firms have financial incentives to avoid being implicated in a recall situation, governmental involvement in recalls may cause firms to internalize social costs when making investment decisions concerning food safety controls. To examine these incentives, we analyze federally supervised meat and poultry recalls from 1982 to 1998 within an event study. Results show significant shareholder losses when publicly traded food companies are implicated in a recall involving serious food safety hazards. We find no evidence that the stock market reacts negatively when recalls involve less severe hazards.     

Heterogeneous returns to personality: the role of occupational choice

We analyze the role of personality in occupational choice and wages using data from Germany for the years 1992 to 2009. Characterizing personality by use of seven complementary measures (Big Five personality traits, locus of control, and a measure of reciprocity), the empirical findings show that personal characteristics are important determinants of occupational choice. Associated with that, identical personality traits are differently rewarded across occupations. Hence, breaking down the analysis on the level of occupational groups provides more detailed results of returns to personality. By evaluating different personality profiles, we additionally estimate the influence of personality as a whole. The estimates establish occupation-specific patterns of significant returns to particular personality profiles. These findings underline the importance to consider the occupational distribution when analyzing returns to personality due to its heterogeneous valuation.     

Monitoring or payroll maximization? What happens when workers enter the boardroom?

Review of Accounting Studies - We examine whether worker representation on corporate boards results in improved monitoring or payroll maximization. Several economic theories predict that worker...     

The legal framework and initiatives for promoting safety in the United Arab Emirates

Injury is a leading cause of morbidity and mortality in the United Arab Emirates (UAE). The UAE is a rapidly developing country with fast economic growth, demographical and environmental changes that are associated with new hazards emerging at a similar pace. The UAE as a federal entity has federal and local systems responsible for safety policy, regulations and enforcement. To set priorities for safety promotion and injury prevention, it is necessary to have data on the most frequent external causes of injury and the main individual, equipment and environmental risk factors that contribute to injury. However good quality data for injury prevention are scarce. The aim of this paper is to describe the scale of injury as a public health problem in the UAE, and the development of safety policies, regulations and promotion efforts with special emphasis on traffic, occupational and child safety.     

Ownership structure and economic performance in the largest european companies

The paper examines the impact of ownership structure on company economic performance in 435 of the largest European companies. Controlling for industry, capital structure and nation effects we find a positive effect of ownership concentration on shareholder value (market‐to‐book value of equity) and profitability (asset returns), but the effect levels off for high ownership shares. Furthermore we propose and support the hypothesis that the identity of large owners—family, bank, institutional investor, government, and other companies—has important implications for corporate strategy and performance. For example, compared to other owner identities, financial investor ownership is found to be associated with higher shareholder value and profitability, but lower sales growth. The effect of ownership concentration is also found to depend on owner identity. Copyright © 2000 John Wiley & Sons, Ltd.