共查询到20条相似文献,搜索用时 15 毫秒
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Abstract . This paper looks at the effectiveness of R&D grants for Canadian plants that already benefit from R&D tax credits. Using a non-parametric matching estimator and data from the 2005 Survey of Innovation from Statistics Canada, we find that firms that benefited from both policy measures introduced more new products than their counterparts that only benefited from R&D tax incentives. They also made more world-first product innovations and were more successful in commercializing their innovations. The paper gives also a detailed step-by-step explanation of how to apply the non-parametric matching technique. 相似文献
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that和which在定语从句中的异同浅析 总被引:1,自引:0,他引:1
定语从句、名词从句、状语从句是英语中重要的学习内容,这部分知识学习的好坏不仅直接关系到语法部分成绩的高低,还间接影响到阅读理解以及大学英语总体水平的提高。文章以区别that和which在定语从句中的异同为主线,在认同两者在定语从句中的相同之处时,附带分析that和which在主语从句中的不同之处;在区分that和which在定语从句的差异时,透析关系代词与关系副词的雷同以及定语从句与状语从句之间联系。 相似文献
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《European Economic Review》2001,45(4-6):905-918
Several papers have suggested that the relationship between changes in average schooling and growth is weak in the cross-country data. This might call into question the relevance of micro estimates of returns to schooling, at least for developing countries. This paper examines the reliability of some of the aggregate evidence, and presents an alternative framework for analysing these questions. 相似文献
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Programs to reduce traffic congestion and air pollution by restricting use of motor vehicles on working days have generally not met with success, given existing studies of such programs. We conduct the first study of Quito, Ecuador's four‐year‐old Pico y Placa program and find that it has reduced ambient concentrations of carbon monoxide (CO), a pollutant primarily emitted by vehicles, by 9% to 11% during peak traffic hours. Given that ambient concentrations of CO generally track the spatial and temporal distributions of traffic, these reductions in pollution suggest similar reductions in vehicle flows. We find no significant evidence that traffic has shifted to other times of the day or week, or to other locations. 相似文献
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Morris CR 《Medical economics》2000,77(5):150, 153-4, 157 passim
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David M. Zimmer 《Journal of Economic Policy Reform》2015,18(4):326-340
This study examines a decade of individual-level US employment and insurance information to investigate whether federally mandated Consolidated Omnibus Reconciliation Act (COBRA) regulation affects post-separation employment activity. The empirical approach addresses the possibility that COBRA enrollment is endogenous with respect to post-separation employment outcomes. The main finding is that, although COBRA enrollees are 5 percentage points less likely to become re-employed, this relationship is not causal. Rather, individuals with lower probabilities of becoming re-employed tend to enroll in COBRA. The reason appears to be because, when compared to subjects who voluntarily leave for other jobs, subjects who separate for other reasons not only are less likely to become re-employed, but they also are approximately 23% more likely to enroll in COBRA. 相似文献
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Christian Pierdzioch Jan‐Christoph Rülke Georg Stadtmann 《The German Economic Review》2012,13(1):103-115
The quantity theory of money, Okun's law, and the Phillips curve are cornerstones of macroeconomic theory. But are they also of practical relevance? Using survey data for the euro area, we found that professional economists’ forecasts are consistent with a version of the quantity theory in which forecasts of the growth rate of money supply correlate in a proportional way with forecasts of the inflation rate. We also found that forecasts of changes in the unemployment rate and forecasts of the growth rate of real output are consistent with Okun's law. Evidence of a systematic link between forecasts of the inflation rate and forecasts of the unemployment rate, however, is not strong. 相似文献
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Holoweiko M 《Medical economics》1997,74(15):134-6, 139-40, 143-50
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This article studies how Argentina’s value-added tax (VAT) revenue has risen to historic highs since its 2001 sovereign default and continues to grow despite unchanged VAT rates, slow economic growth, stagnant household consumption, and low commodity prices after 2010. In 2015, VAT revenue accounted for one-quarter of all tax revenue in Argentina. We show that Argentina’s banked population went from less than 41.6% in 2003 to 89.6% in 2016. Consequently, there was significant growth in electronic payments via credit cards and debit cards. Using time series regression, the authors show that the rising banked population and card growth is correlated with VAT-to-GDP increases from 2002 to 2015. The authors posit that one reason for these correlations is that some consumption is shifting from informal (harder to tax) markets to formal (easier to tax markets) as cash use declined and card use grew. Also, rising electronic payments likely explains improved VAT compliance as well—the Argentine VAT noncompliance rate averaged 36.4% between 2000 and 2005 but improved to 20.5% between 2006 and 2010 (Trigueros, Longinotti, & Vecorena, 2013). 相似文献
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《国际经济合作》2001,(3)
Kristina Taylor picks a handful ofclothing from the sale rack at Macy'sNew York flagship store, passes pricetags past a scanner on the wall, andawaits the verdict. She can hardly believe her eyes: That pink Calvin Kleinjeans shirt, Which went for $58, isPriced at $8.70, and a purpletank top, once $100, is now$14.70. "There were prettygood sales before Christmas,but not as good as now," saythe 28-year-old StudentIt's a bargain out there.There were sales beforeChristmas. There were salesaf… 相似文献
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Gary L. Shoesmith 《Applied economics》2013,45(23):2957-2973
Previous research has failed to explain the rise and fall of US crime since 1970. This study uses cointegration, error correction and common long-memory components analyses to demonstrate that four basic crime factors explaining both the increases in US violent and property crime between 1970 and 1991 and the dramatic declines in crime after 1991. The four factors include arrest rates, income per capita, the proportion of criminal-justice resources devoted to drug crime and alcohol consumption. Error correction models and common long-memory factors show an especially close link between crime rates and the percentage of prison resources devoted to drug offenders. Similar factors result in cointegrated models for murder, rape, robbery, assault and larceny. Additional modelling shows that effective abortion rates computed along the lines of Donohue and Levitt (2001) do not help in explaining the rise and fall of US crime. 相似文献
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We investigate the role of intentions in two-player two-stage games. For this purpose we systematically vary the set of opportunity sets the first mover can choose from and study how the second mover reacts not only to opportunities of gains but also of losses created by the choice of the first mover. We find that the possibility of gains for the second mover (generosity) and the risk of losses for the first mover (vulnerability) are important drivers for second mover behavior. On the other hand, efficiency concerns and an aversion against violating trust seem to be far less important motivations. We also find that second movers compare the actual choice of the first mover and the alternative choices that would have been available to him to allocations that involve equal material payoffs. 相似文献