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71.
72.
Abstract This paper provides evidence on the impact of company training, of post-compulsory education and of the UK Youth Training Scheme in the late 1980's on the earnings of 21-year-old employees in England and Wales. Earnings equations are estimated for each of seven groups of employees who have followed alternative routes from compulsory education into employment, allowing for selectivity into these routes. There are several findings, including: both high parental social class and better school qualifications help to channel people into higher status routes, while high local unemployment has the opposite effect; participation in company training in long spells substantially raises wages but short spells do not; YTS participation fails to raise, and possibly substantially lowers, wages even three years after graduation compared to those who left school at 16 and went to work and received no training; there is weak evidence that, even for those that do not enter higher education, it is better to stay on at school after 16 than go into YTS.  相似文献   
73.
On Choosing and Bounding Probability Metrics   总被引:6,自引:0,他引:6  
When studying convergence of measures, an important issue is the choice of probability metric. We provide a summary and some new results concerning bounds among some important probability metrics/distances that are used by statisticians and probabilists. Knowledge of other metrics can provide a means of deriving bounds for another one in an applied problem. Considering other metrics can also provide alternate insights. We also give examples that show that rates of convergence can strongly depend on the metric chosen. Careful consideration is necessary when choosing a metric.  相似文献   
74.
Technology transactions: networks over markets   总被引:1,自引:0,他引:1  
There is a widespread belief in the business community that firms can rely on the market for buying and selling technological opportunities. The argument is: with so much technology development going on in the world, ‘there must be somebody somewhere who has the technology we need.’ According to this belief, acquiring new technology just boils down to finding the supplier, possibly with the help of a specialized intermediary. Several large firms have indeed developed ambitious mechanisms for acquiring the needed technological know-how as they proceed to make and market a new product. We contend that this concept of the technology transfer process is erroneous, as it conflicts with actual practice. The very high transaction costs entailed leave considerable room for opportunistic behavior and are more likely to occur when the parties do not know each other. An effective way to reduce transaction costs, therefore, is to limit technology transfers to the firm's partners, i.e. organizations with which the firm has already interacted in the past. Our research provides evidence that successful technology transfers typically take place between suppliers and buyers who had business relationships before considering a technology agreement. In addition, we report findings that companies using intermediaries (technological opportunities catalogues, databases, fairs, etc.) have been disappointed in their attempts to find new technologies from unknown sources. Because of the high risk of opportunistic behavior, it is practically impossible to assess the value of a technology without knowing who sells it. Similarly, the technology transfer capabilities of a company are difficult to appraise without prior knowledge through business interaction. To a certain extent, it may be better to buy any technology from a partner that one knows well than to buy a supposedly good technology from a firm with which one has had no experience. To put it bluntly: the identity of the partner may actually matter more than the technology being traded! Consequently, the relevant framework for technology transfer is built on a ‘network concept’ rather than the ‘market concept’. Firms wishing to acquire new technology should turn first to their network of trusted business partners, looking for available technological opportunities instead of trying to buy technology from unrelated organizations.  相似文献   
75.
76.
Firm level data for the manufacturing sector in Africa, presented in this paper, shows very low levels of investment. The importance of profit effects on investment is investigated using a flexible accelerator, a specification based on the Euler equation and a simple generalisation of these specificiations. There are controls for firm fixed effects. It is shown that the profit effect is very similar for both the accelerator and Euler equation specifications. A comparison with other studies shows that, for small firms, the effect is much smaller in Africa than for other countries. Reasons for the relative insensitivity of investment to profits in African firms are suggested. For the most general specification tested there are no significant differences in the size of the profit effect across the four countries in the study.  相似文献   
77.
78.
Production function estimates are provided for Soviet industrial production and gross national product for the period 1950–86. A variety of alternative specifications is tested, including Cobb-Douglas, constant elasticity of substitution and variable elasticity of substitution production functions, and an error correction mechanism is used to investigate the long-run properties of the estimated equation. The structural stability of the estimates is also examined. Constant-returns-to-scale Cobb-Douglas production functions suggest that the rate of total factor productivity growth in the Soviet economy has declined steadily over time, becoming negative sometime in the period between 1970 and 1980. However the extensive statistical tests can doubt on the validity of any production function estimated on Soviet data.  相似文献   
79.
This paper exploits the remarkable increase in the average educational attainment of Australian youth during the 1980's to evaluate the role of education in labour market performance. Rather than focus on the impact of schooling on wages, however, we examine changes in the occupational distribution of recent labour market entrants. The evidence indicates that the educational expansion appears to move all individuals up the educational ladder without altering their relative position. The results indicate that while the second cohort obtained substantially more education than the first cohort the occupational distribution of the two cohorts were almost identical. Furthermore, there was no evidence that the increased education counterbalanced changes in the structure of labour demand or manifested itself in higher wages.  相似文献   
80.
Two Trees     
We solve a model with two i.i.d. Lucas trees. Although the correspondingone-tree model produces a constant price-dividend ratio andi.i.d. returns, the two-tree model produces interesting asset-pricingdynamics. Investors want to rebalance their portfolios afterany change in value. Because the size of the trees is fixed,prices must adjust to offset this desire. As a result, expectedreturns, excess returns, and return volatility all vary throughtime. Returns display serial correlation and are predictablefrom price-dividend ratios. Return volatility differs from cash-flowvolatility, and return shocks can occur without news about cashflows.  相似文献   
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