The economic law of population distribution and migration

"The economic law of population distribution and migration has been studied chiefly based on the Chinese situation. The distribution and development of productive forces decide the distribution and migration of population, and in turn, the latter influences the former. The population distributions in three different stages of social development, namely agricultural, industrial and information society, are described. A new concept in population economics is introduced, i.e. population economic density, which is different from the concept of population density. The formula of population economic density is P(population)/R(resources). Many kinds of migration are analysed, and it is believed that the main efficient cause of migration is economy."     

A generalized maximum likelihood characterization of the normal distribution

LetP be a probability measure on ℝ andI _x be the set of alln-dimensional rectangles containingx. If for allx ∈ ℝⁿ and θ ∈ ℝ the inequality holds,P is a normal distributioin with mean 0 or the unit mass at 0. The result generalizes Teicher’s (1961) maximum likelihood characterization of the normal density to a characterization ofN(0, σ²) amongall distributions (including those without density). The m.l. principle used is that of Scholz (1980).     

Economic humidity control: an alternative to reheat

Heat pipe technology will have a significant impact on the power consumption of many manufacturing industries, the installation costs of new or replacement air conditioning systems, and on electric utility peak demands.     

Are you a strategist or just a manager?

Perhaps the greatest strategist of all time was not a business executive but a general. Helmuth von Moltke, chief of the Prussian and German general staffs from 1858 to 1888, issued "directives" to his officers rather than specific commands. These guidelines for autonomous decision making encouraged Moltke's subordinates to show individual initiative. In this article, Hans Hinterhuber and Wolfgang Popp translate Moltke's example into business terms. According to Moltke, strategy is applied common sense and cannot be taught. The authors suggest that good entrepreneurs and managers--along with generals--are born with the qualities that make them successful. But even if managers have the potential to be good strategists, they must develop and hone their natural talents. And CEOs and top management can help by identifying and promoting such talents in their employees. Hinterhuber and Popp have created a questionnaire that helps measure strategic management competence. Managers and entrepreneurs take this test themselves, answering ten questions such as, "Do I have an entrepreneurial vision?", "Do I have a corporate philosophy?", and "Do I have competitive advantages?" Using the questionnaire, company management can evaluate managers being considered for a promotion. At the same time, those who take the test can use it to determine their own performance as strategists. Strategic managers provide subordinates with general guidelines, just as Helmuth von Moltke issued directives to his officers. And outstanding entrepreneurs create a corporate culture in which their vision, philosophy, and business strategies are implemented by employees who think independently.     

Price as a signal of quality: Canada in the international context

Studies have shown that price is very poorly correlated with quality. This paper discusses the methodological criticisms of the earlier work, concluding that the original results remain robust. Examination of 91 sets of Canadian products containing 1020 items reinforces the conclusions of earlier work for the United States and Japan. These international studies contradict the conventional wisdom that price is an adequate signal of quality. We also test the hypotheses that price is a better signal of quality (a) after product tests have been published, and (b) for higher priced items which presumably justify larger investments in search. Canadian data do not support either hypothesis. Some theoretical explanations are outlined and a conclusion briefly presents implications for policy.

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Der Preis als Qualitätsindikator: Kanadische und internationale Befunde

Zusammenfassung Zahlreiche Untersuchungsergebnisse haben gezeigt, daß Preis und Qualität in einem nur sehr dürftigen Zusammenhang stehen. Diese Befunde sind unter methodischem Gesichtspunkt kritisiert worden, der vorliegende Beitrag versucht jedoch zu zeigen, daß die Befunde robust sind und der Kritik standhalten können. Eine Untersuchung der Autoren anhand von 91 kanadischen Warentests mit 1,020 Artikeln bestätigt darüberhinaus die früheren Ergebnisse aus den Vereinigten Staaten und Japan. Insgesamt widersprechen diese internationalen Untersuchungen der herkömmlichen Ansicht, daß der Preis eines Gutes ein angemessener Qualitätsindikator sei.Darüber hinaus prüft die Studie der Autoren die Hypothese, daß der Preis ein besserer Qualitätsindikator ist, (a) nachdem Warentests durchgeführt und die Ergebnisse publiziert wurden, und (b) wenn es sich um teurere Produkte handelt, die vermutlich einen höheren Suchaufwand rechtfertigen. Beide Hypothesen werden durch kanadische Daten nicht gestützt. Abschließend werden einige verbraucherpolitische Implikationen dieser Befunde behandelt.The authors are grateful to referees for important assistance.

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Richard W. Bodell is Assistant Professor and Robert R. Kerton is Professor in the Department of Economics at the University of Waterloo, Waterloo, Ontario, Canada N2L 3G1. Richard W. Schuster is an economist with the Economics Department of the Bank of Nova Scotia in Toronto.     

Lifecourse migration and redistribution of the elderly across U.S. regions and metropolitan areas

This analysis investigates the assertion that the baby-boom cohorts, by virtue of their large size and new lifecourse redistribution tendencies, are likely to initiate significant shifts in the distribution of the elderly population as these cohorts enter into the 65-and-older age categories. The author contends that cohorts' pre-elderly lifecourse migration patterns should be incorporated into studies of elderly population distribution shifts. 2 questions are addressed: will the new lifecourse migration patterns provide for a more deconcentrated redistribution of the baby-boom cohorts, both prior to and after their entry into the elderly age categories, than the lifecourse migration patterns followed by earlier cohorts; and will the new lifecourse distribution pattern lead, in the long run, to a significantly more deconcentrated distribution of the elderly population. The examination of these 2 questions focuses, largely, on redistribution across 9 broad regional and metropolitan area groupings defined on the basis of 3 census regions -- the North (combining the Northeast and Midwest census regions), the South, and the West -- and 3 categories of metropolitan status -- large metropolitan areas (those with 1980 populations exceeding 1 million), other metropolitan areas, and nonmetropolitan areas. The comparison of "new" versus "old" lifecourse migration patterns contrasts the census-based age-specific migration stream rates, registered over the 1975-80 period, with those registered over the 1965-70 period. Given the sharp and broad-based shift toward deconcentrated redistribution which characterized practically all segments of the population during the 1970s, it is assumed that the age-specific migration patterns observed over the 1975-80 period approximate the more deconcentrated redistribution tendencies which will be adopted by the baby-boom cohorts (and their successors) over the remainder of their lifecourse. The 1965-70 net migration rates point up the aggregate redistribution implications associated with the "old" lifecourse migration stream patterns. Among the rates for North large metropolitan areas, the only positive net migration is observed for the 25-29 age category; the greatest net outmigration rate is shown for the 65-69 age category. The rates for South nonmetropolitan areas are negative for all age categories under age 55, and most accentuated outmigration is shown during the young-adult years. The positive net migration exhibited for the older adult and post retirement ages reflects the low outmigration rates from nonmetropolitan areas during these ages and the slight peaking of immigration for these years. The results of this analysis imply that more attention should be devoted to migration, over the entirety of the lifecourse, in future studies of population redistribution.