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551.
552.
Increasing attention is being given to the possible consequences which might follow from the exhaustion of the world's natural resources. Countering the pessimistic conclusions of such institutions as the Club of Rome, economists such as Wilfred Beckerman have emphasized the importance of substitution, pointing to many examples where a shortage of one raw material has led to the discovery or development of alternative materials, e.g. artificial for natural rubber, aluminium for copper.Substitution usually occurs through normal market mechanisms, i.e. changes in relative prices. However in some circumstances the market mechanism may be inhibited by a variety of factors, so that its operation requires to be supplemented by an outside agency. This article explores this possibility in relation to the paper making industry, which provides a particularly interesting example owing to the existence of a well established market in waste paper, the main substitute for the major natural resource, woodpulp.A brief indication is given of the relative importance of waste paper and an outline of the structure of the U.K. market; the conditions under which greater utilization of waste paper might occur are then considered taking a sideways look at the influence of the individual. In the final section the various implications for the role of the state are summarized. 相似文献
553.
Mazur DP 《Population studies》1975,29(1):21-35
Summary Most abortions in Polish hospitals and clinics are performed on social indications. In the 22 administrative areas of Poland, the high rates of divorce and large proportions of total population employed in non-agricultural pursuits reflect the individualistic approach to family planning which is characteristic of present-day urban society. Industrialization is disruptive to the normal functioning of the country's traditionally large families. In addition, the gross reproduction rate increases directly with the proportion of the peasant population in 17 voivodships and five large cities of Poland, whereas in the urban sector the gross reproduction rate has fallen below replacement level in the past few years. Rural birth rates will continue to decline. In view of increasing needs for future manpower, population policy aimed at increasing births through incentives to prospective mothers may achieve a limited degree of success in cities only among the educated segments of the female population. 相似文献
554.
A rational economic hypothesis of the citizen's decision tovote or not vote in U. S. presidential elections has been citedas an example of the replacement of social-psychologically oriented"empirical generalizations" by axiomatically based deductivepropositions in political science. However, close scrutiny showsthat the rational (or political) economic paradigm is no moreaccurate a theory than previously popular systems analysis orfunctional paradigms. The claimed verification of the originalhypothesis was based on an apparently imprecise, adhoc, ordinalprocedure that could not distinguish between the intimatelyrelated rational economic and social-psychological hypotheses.A more powerful technique resolves the issue in favor of thelatter model for the data used by the original authors. 相似文献
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Guerrero AM 《Initiatives in population》1976,2(2-3):2-9
The population program in 2 provinces of the Philippines 1 which has achieved success already and 1 where success is expected ultimately - is described. The Laguna program, launched in 1960, has reduced the annual birthrate to 1.8%, the lowest rate in the country. Governor F.T. San Luis, elected that year, is credited with much of the success of the program. The relatively high standard of living of the people in the province, cooperation of various related agencies, and the consistency and continuity of the program have made for success, despite initial problems with financing, conservative opposition, and interagency confusion. Capiz province is the model family program of the Commission on Population - Total Integrated Development Approach program for the southern region of the country. This program originally worked to develop self-awareness concerning needs and ambitions for the future among the people. When the program got under way in 1975, it stressed training, orientation, and education campaigns. Family planning in Capiz is part of the larger socioeconomic development program. 相似文献
558.
In two experiments, refusal rates to telephone interviews werenot affected by substantial changes in the introductory remarksof the interviewer. A prior letter significantly lowered refusalrates in a third experiment. In all three, interviewer sex hadno effect. 相似文献
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