Einige neuere Entwicklungen in der Messung der industriellen Konzentration

Zusammenfassung In der Diskussion verschiedener Konzentrationsma?e zeigt die Informationsentropie in der Form des normierten Entropiema?esE optimale Eigenschaften. Gleich demC-Index und demRosenbluth-Index reagiert sie wettbewerbstheoretisch „richtig“, weist aber wegen ihrer axiomatischen Fundierung zus?tzlich die Disaggregations-Eigenschaft auf. Zur ersten Orientierung über Konzentrationstendenzen hat sich der Konzentrationskoeffizient trotz mancher Nachteile als nützlich erwiesen. Einige Ergebnisse werden am Beispiel der Automobilproduktion Kanadas und der BRD gezeigt.

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Summary Among the discussed measures of business concentration the standardized entropy-measureE reveals most favourable properties. Alike the indexes ofHirschman and ofRosenbluth it reacts ‘as expected’ in terms of the theory of industrial organization. In addition,E makes disaggregation feasible because of its axiomatic basis. For purposes of observing concentration at a first glance the method of concentration ratios proves to be a useful tool despite conceptual shortcomings. Some findings are shown for the Canadian and the West-German passenger-car industry.

     

The role of the family in development

It is important for the development planner to view the family as a flexible organizational unit of individuals who have different roles, privileges, rewards, options, and obligations. In developing countries the criteria for distributing resources and responsibilities within families are not the same as the Western criteria of development needs and requirements. Neither do sex and age, particularly among the poor, determine the roles people play in the family. Women play important productive roles in developing countries and a critical role in the cultivation of all crops, subsistence and cash, in sub-Saharan Africa. Children also make important contributions. Although all family members must work hard, scarce resources and immediate needs frequently result in unequal distribution of resources and access to services. All members of low-income families in developing countries are involved in the struggle for survival, for no 1 income source is adequate. The family's decision-making process is implicit in all its distribution of both responsibilities and resources. If wives in poor households are able to retain control of their earnings, they can have more power. In sub-Saharan Africa, where the women have a major agricultural role, their power bases are broader.     

Breastfeeding versus infant formula: the Kenyan case

An Infant Feeding Practices Study (IFPS) in 1982 in Kenya, which included a cross-sectional survey of a weighted sample of 980 low and middle income Nairobi mothers who had given birth in the previous 18 months, found that most women breastfeed their infants for long periods, but many introduce alternate feeding, especially infant formula, in the 1st 4 months (86 and 50% of the infants were breastfed at 6 and 15 months respectively, but 50% of the 2 month-olds and 63% of the 4 month-olds were receiving substitutes, mostly formula). This is done largely out of the belief that infant formula is an additional health benefit. A workshop to discuss the findings of the IFPS and other available data, and to make policy recommendations urged the adoption of a policy of protection, support and promotion of breastfeeding. Since breastfeeding is already widely prevalent in Kenya, protection of breastfeeding should receive the 1st priority in policy related to infant feeding. Attention should be directed at at least 2 influences which help undermine breastfeeding: widespread availability and promotion of breast milk substitutes. Support for breastfeeding is viewed as the 2nd policy priority. Situations where support can play a helpful role are, women's paid employment outside the home, hospital practices, maternal morbidity, and difficulties in breastfeeding. Since promotion is the least cost effective of the 3 options, and most Kenyan women are already motivated to breastfeed, this should be the last priority. Promotion includes reeduction of mothers to make them better aware of the benefits of breastfeeding. The workshop recommended the dissemination of appropriate information, consisting of standarized messages based on clearcut guidelines, using mass media techniques.     

Rent Subsidy and Housing Satisfaction The Case of Urban Renewal In Lubbock, Texas

—Governmental programs proposing rental supplements for low-income families assume that social and economic conditions of these families may be improved by such subsidy. However, this assumption has not been adequately tested by social science research. Data presented here were gathered at an urban renewal relocation housing project in Lubbock, Texas, and suggest that when families who, before urban renewal, were self-sufficient in slum housing are forced into welfare situations because of rent subsidy programs, dissatisfaction with relocation facilities results. The data also indicate that dissatisfaction is correlated positively with the number of persons in the household, the age of residents, and socioeconomic status.