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Individual differences in psychophysical data are examined in an olfactory experiment using a group of sixteen children (9 year olds) and three different techniques: magnitude estimation (ME), reglets or sticks (RE) and finger span (FS). From the responses given in the three techniques Steven's functions were calculated. Group and individual fits to the power law are analyzed. Comparisons of all individual curves were also done and consistency of the subjects responses across techniques was examined. Results show that: (1) while group data fit to the power law, individual data, in general, do not; (2) individual differences are found in both slopes and intercepts and (3) subjects are consistent in their judgments across techniques. These results might be interpreted in a sensory and cognitive context. Further research is needed to identify the specific contribution of sensory and cognitive sources to the individual differences in the psychophysical function. 相似文献
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In this paper we analyse the evolution of the direct and ultimate ownership structure of a large sample of UK non‐financial listed firms over the last decade. Our data show that while outsider ownership is relatively stable over time, managerial ownership shows a sharp decreasing trend and it is significantly lower in the presence of a large outside controller. Nonetheless, while average shareholding by executives confirms the decreasing trend, the opposite holds for non‐executive directors. In addition, while average board size is rather constant in time, the proportion of non‐executives is steadily increasing in time. As far as ultimate ownership is concerned, our data show that the existence of complex ownership structures in the UK is far from being negligible. We document that more than 10 per cent of the firms are owned via a complex structure and the degree of divergence between cash flow and control rights for these firms is around 11 per cent at the 10 per cent cut‐off. Our data also suggest that the presence of complex structures is decreasing in time at any cut‐off level. In addition, we report a decreasing trend over time of “widely held” firms. Finally, we show preliminary evidence of a negative impact of the divergence between cash flow and control rights on firm value. 相似文献
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We document, for the first time, that a conservative leverage policy directed at maintaining financial flexibility can enhance investment ability. Our analysis reveals that following a period of low leverage, firms make larger capital expenditures and increase abnormal investment. We find that these new investments are financed through new issues of debt. The impact of financial flexibility is both statistically significant and economically sizable. Further, long-run performance tests reveal that financially flexible firms not only invest more but also invest better. Our results are consistent with the view that financial flexibility in the form of untapped reserves of borrowing power is a crucial missing link in capital structure theory. 相似文献
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