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251.
Various policies are being proposed for reducing the energy dependence of Western Europe during the 1980s. This paper discusses their impacts through the use of a simple simulation model under different assumptions concerning energy prices conservation measures and overall economic growth. It also assesses broad energy prospects for three regions of Western Europe up to 1990. In particular, the paper analyzes the scope for substituting domestically produced energy for imported energy. Tentative policy recommendations are presented following presentation of the results. Preference is expressed for combined price-cum-rationing measures. Coordinated and generalized energy consumption policies, so as to improve the energy efficiency for both intermediate and final uses, are also discussed. 相似文献
252.
Summary Some relevant traits of a wild (L) and a laboratory (C) strain ofHylemya antiqua (Meigen), determining differences in their pupation ability under experimental conditions have been investigated in relation to genetic
control. The wild strain showed an intrinsic higher pupation ability than the laboratory strain. The minimum feeding period
was 0.6 days longer for the C strain. The minimum larval dry weight was different for the two strains. With a normal feeding
period C larvae pupated on average 1.63 days later than L larvae. By the shortening of the larval feeding period an acceleration
of the larval development of both strains was observed: the acceleration of development was more marked for the wild strain.
This result has been contrasted with published works onDrosphila. The consequences of these differences as far as the competitive ability of each strain is concerned, have been discussed
in relation to genetic control. 相似文献
253.
Greg Kaplan Giovanni L. Violante 《Econometrica : journal of the Econometric Society》2014,82(4):1199-1239
A wide body of empirical evidence finds that approximately 25 percent of fiscal stimulus payments (e.g., tax rebates) are spent on nondurable household consumption in the quarter that they are received. To interpret this fact, we develop a structural economic model where households can hold two assets: a low‐return liquid asset (e.g., cash, checking account) and a high‐return illiquid asset that carries a transaction cost (e.g., housing, retirement account). The optimal life‐cycle pattern of portfolio choice implies that many households in the model are “wealthy hand‐to‐mouth”: they hold little or no liquid wealth despite owning sizable quantities of illiquid assets. Therefore, they display large propensities to consume out of additional transitory income, and small propensities to consume out of news about future income. We document the existence of such households in data from the Survey of Consumer Finances. A version of the model parameterized to the 2001 tax rebate episode yields consumption responses to fiscal stimulus payments that are in line with the evidence, and an order of magnitude larger than in the standard “one‐asset” framework. The model's nonlinearities with respect to the rebate size and the prevailing aggregate economic conditions have implications for policy design. 相似文献
254.
Intrasensory Redundancy Facilitates Infant Detection of Tempo: Extending Predictions of the Intersensory Redundancy Hypothesis 下载免费PDF全文
Lorraine E. Bahrick Robert Lickliter Irina Castellanos James Torrence Todd 《Infancy》2015,20(4):377-404
Research has demonstrated that intersensory redundancy (stimulation synchronized across multiple senses) is highly salient and facilitates processing of amodal properties in multimodal events, bootstrapping early perceptual development. The present study is the first to extend this central principle of the intersensory redundancy hypothesis (IRH) to certain types of intrasensory redundancy (stimulation synchronized within a single sense). Infants were habituated to videos of a toy hammer tapping silently (unimodal control), depicting intersensory redundancy (synchronized with a soundtrack) or intrasensory redundancy (synchronized with another visual event; light flashing or bat tapping). In Experiment 1, 2‐month‐olds showed both intersensory and intrasensory facilitation (with respect to the unimodal control) for detecting a change in tempo. However, intrasensory facilitation was found when the hammer was synchronized with the light flashing (different motion) but not with the bat tapping (same motion). Experiment 2 tested 3‐month‐olds using a somewhat easier tempo contrast. Results supported a similarity hypothesis: intrasensory redundancy between two dissimilar events was more effective than that between two similar events for promoting processing of amodal properties. These findings extend the IRH and indicate that in addition to intersensory redundancy, intrasensory redundancy between two synchronized dissimilar visual events is also effective in promoting perceptual processing of amodal event properties. 相似文献
255.
Giorgio Bellettini Carlotta Berti Ceroni Giovanni Prarolo 《Journal of the European Economic Association》2014,12(3):641-671
We use a political economy model of Schumpeterian growth with entry to investigate how an incumbent politician can strategically use the level of red tape to acquire incumbency advantage. By setting sufficiently high red tape, the politician induces the incumbent firm in the intermediate sector to invest in political connections, which are valued also by voters, who recognize that bureaucratic costs can be reduced by connected firms. Within this framework, we study the Markov perfect equilibria of an infinitely repeated game among politicians, firms, and voters, and show that all equilibria are characterized by investments in political connections and the re‐election of the incumbent politician. Political connections may prevent entry of advanced competitors and cause the economy to lag behind the technological frontier. Our model provides a possible explanation for the persistence of inefficient democracies and political barriers to technology development, where these reflect shared rather than conflicting interests. 相似文献
256.
Torti Agostino Arena Marika Azzone Giovanni Secchi Piercesare Vantini Simone 《Statistical Methods and Applications》2022,31(4):901-923
Statistical Methods & Applications - This paper introduces a methodology to evaluate the socio-economic impacts of closure for maintenance of one or more infrastructures of a large and complex... 相似文献
257.
Journal of Management and Governance - This paper investigates the case of a hybrid organization located in Northern Italy with the aim of providing an understanding of the role of the context,... 相似文献
258.
The practical importance of recruitment is witnessed by the existence of specific personnel management functions within firms. The aim of the paper is to investigate the importance of firms' personnel management attitudes for recruitment procedures. We focus on the choice of the first search channel and on the subsequent search spell. The model is empirically estimated by using a data set on recruitment behaviour of Dutch firms. The results show that personnel management considerations are important for the choice of the recruitment channel. It appears that advertisement is preferred to the informal channel in that employers believe it is faster and generates applicants who better comply with the hiring standards. Furthermore, employers turn out to prefer mainly the informal channel when recruitment costs are considered important. 相似文献
259.
The contemporary media environment represents the greatest challenge ever to journalism's legitimacy. Surveys conducted in different parts of the world highlight a decline in trust in news media. Due to the numerous changes in the news media environment, different investigative tools are required to grasp the mechanisms underlying news media trust from those adopted so far. This article provides a review of existing media trust research and argues that it is necessary to investigate news media trust (also) from a qualitative perspective because today understanding media trust is as crucial as measuring it. 相似文献
260.
The Journal of Economic Inequality - Household surveys underreport incomes from the upper tail of the distribution, affecting our assessment about inequality. This paper offers a tractable... 相似文献