Stochastic trend,weather and US corn yield variability

Regional corn yield models incorporating stochastic trends, prices and weather variables are estimated. Hypothesis tests suggest yield variability has increased because of an increase in error variance and an increase in weather-related effects. Decomposition of the error variance shows much of its increase is due to an increased correlaion between regional yields.     

The Effect Of Stock Splits On Liquidity And Excess Returns: Evidence From Shareholder Ownership Composition

We examine the influence of firm ownership composition on both the abnormal returns at the announcement of a stock split and liquidity changes following a stock split. We find three results. First, the largest post‐split increase in institutional ownership occurs for firms that had low institutional ownership before the split. Second, changes in liquidity are negatively related to the level of institutional ownership before the split. Last, the abnormal return following a split is negatively related to the level of institutional ownership before the split. These findings are important as they shed new light on the source of stock split announcement returns.     

Child Health and Economic Crisis in Peru

The effect of macroeconomic crises on child health is a topicof great policy importance. This article analyzes the impactof a profound crisis in Peru on infant mortality. It finds anincrease of about 2.5 percentage points in the infant mortalityrate for children born during the crisis of the late 1980s,which implies that about 17,000 more children died than wouldhave in the absence of the crisis. Accounting for the precisesource of the increase in infant mortality is difficult, butit appears that the collapse in public and private expenditureson health played an important role.     

An examination of the ethical beliefs of managers using selected scenarios in a cross-cultural environment

Academic literature addressing the topic of business ethics has paid little attention to cross-cultural studies of business ethics. Uncertainty exists concerning the effect of culture on ethical beliefs. The purpose of this research is to compare the ethical beliefs of managers operating in South Africa and Australia. Responses of 52 managers to a series of ethical scenarios were sought. Results indicate that despite differences in socio-cultural and political factors there are no statistically significant differences between the two groups regarding their own ethical beliefs. Results thus support the view that culture has little or no impact on ethical beliefs.Russell Abratt (DBA Pretoria) is Professor of Marketing at the University of Witwatersrand, Johannesburg, South Africa. His research interests include business ethics and promotional strategy. His work has been published in various sources includingJournal of Business Ethics, European Journal of Marketing, International Journal of Advertising andIndustrial Marketing Management.Deon Nel (DCom Pretoria) is Professor of Marketing at the University of Pretoria, South Africa. His research interests include business ethics and group decision making in organisations. His work has been published in various sources includingJournal of Business Ethics, European Journal of Marketing, Management Research News.Nicola Higgs is a graduate student at the University of the Witwatersrand, Johannesburg, South Africa.     

The social media faces of major global financial service brands

With the advent of social media, brand management has become not only more difficult, but also increasingly critical to the credibility and reputation of firms. Moreover, consumer-generated content and its rapid diffusion takes control over advertising-intended messages away from brand managers. Financial services brand managers will not fully be able to control the destinies of their brands, but at the very least they need to be involved in the conversations that speak about their brand. This article suggests a powerful analytical tool Chernoff Faces, which can add to financial service brand managers’ arsenal.     

Do Macroeconomic Crises Always Slow Human Capital Accumulation?

The impact of macroeconomic crises on the investments made byparents in the human capital of their children is a questionof considerable policy importance. Analysis of the effects ofthe profound 1988–92 macroeconomic crisis in Peru on theschooling and employment decisions of school-age children inurban areas finds no effect on attendance rates but a significantdecline in the fraction of children who are both employed andattend school. It also finds significantly higher mean educationalattainment for children exposed to the crisis than for thosewho were not. These findings may be related: Children who arenot employed have more time available and may therefore putmore effort into school.     

Trade Liberalization and Industry Wage Structure: Evidence from Brazil

Industry affiliation provides an important channel through whichtrade liberalization can affect worker earnings and wage inequalitybetween skilled and unskilled workers. This empirical studyof the impact of the 1988–94 trade liberalization in Brazilon the industry wage structure suggests that although industryaffiliation is an important component of worker earnings, thestructure of industry wage premiums is relatively stable overtime. There is no statistical association between changes inindustry wage premiums and changes in trade policy or betweenindustry-specific skill premiums to university graduates andtrade policy. Thus trade liberalization in Brazil did not significantlycontribute to increased wage inequality between skilled andunskilled workers through changes in industry wage premiums.The difference between these results and those obtained forother countries (such as Colombia and Mexico) provides fruitfulground for studying the conditions under which trade reformsdo not have an adverse effect on industry wage differentials.     

Disability, Poverty, and Schooling in Developing Countries: Results from 14 Household Surveys

Analysis of 14 household surveys from 13 developing countriessuggests that 1–2 percent of the population have disabilities.Adults with disabilities typically live in poorer than averagehouseholds: disability is associated with about a 10 percentagepoint increase in the probability of falling in the two poorestquintiles. Much of the association appears to reflect lowereducational attainment among adults with disabilities. Peopleof ages 6–17 with disabilities do not live in systematicallywealthier or poorer households than other people of their age,although in all countries studied they are significantly lesslikely to start school or to be enrolled at the time of thesurvey. The order of magnitude of the school participation deficitassociated with disability—which is as high as 50 percentagepoints in 3 of the 13 countries—is often larger than deficitsrelated to other characteristics, such as gender, rural residence,or economic status differentials. The results suggest a worrisomevicious cycle of low schooling attainment and subsequent povertyamong people with disabilities in developing countries.     

Weak Links in the Chain: A Diagnosis of Health Policy in Poor Countries

Recent empirical and theoretical literature sheds light on thedisappointing experience with implementation of primary healthcare programs in developing countries. This article focuseson the evidence showing two weak links in the chain betweengovernment spending for services to improve health and actualimprovements in health status. First, institutional capacityis a vital ingredient in providing effective services. Whenthis capacity is inadequate, health spending, even on the rightservices, may lead to little actual provision of services. Second,the net effect of government health services depends on theseverity of market failures—the more severe the marketfailures, the greater the potential for government servicesto have an impact. Evidence suggests that market failures arethe least severe for relatively inexpensive curative services,which often absorb the bulk of primary health care budgets.A companion paper, available from the authors (seep. 219), offersa perspective on how government funds can best be used to improvehealth and well-being in developing countries. It gives an alternativeview of appropriate public health policy, one that focuses onmitigating the characteristic market failures of the sectorand tailoring public health activities to the government's abilityto deliver various services.