排序方式: 共有48条查询结果,搜索用时 15 毫秒
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Modeling the length and shape of the R&D lag: an application to UK agricultural productivity 总被引:2,自引:0,他引:2
This article updates total factor productivity (TFP) growth in UK agriculture from 1953–2005 and shows that public and private research and returns to scale explain TFP. Cointegration and causality tests are used to investigate the validity of attempts to explain UK agricultural productivity with R&D and related technology variables. Then, the length and shape of the lag structures are modeled and compared with the structures that are commonly imposed on the data. The rates of return (ROR) to R&D using the data determined lags differ considerably from those obtained by imposing lag shapes. These comparisons show that the ROR to public R&D are sensitive to the lag shape as well as its length and that the omission of other technology variables, such as mechanical and chemical patents pertaining to agriculture and farm size can bias the ROR. 相似文献
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This paper investigates how large family shareholders and institutional block-holders jointly influence informed trading and firm valuation in the Hong Kong stock market. It combines market microstructure research with studies on the governance roles of multiple block-holders and finds that institutional block-holders rely on their relative controlling power vis-à-vis family owners to mitigate problems associated with informed trading. They also use their ownership rights to improve the structure of informed trading. However, these governance roles are predominantly exercised by pressure-resistant institutional block-holders. Informed trading reduces firm valuation, while an improvement in its structure increases valuation. Therefore, the governance roles of controlling families and pressure-resistant institutional block-holders may have different implications in terms of investors’ perceptions of private information risk. 相似文献
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Empirical tests of theories of financial market integration and segmentation have predominantly focused on developed OECD countries and the emerging markets of Asia Pacific. This study uses a unique panel of equity market indices from the principal Southern African Customs Union (SACU) markets. It tests the hypothesis of market integration using a cointegration approach. Markets that are found to be integrated are then tested for evidence of Granger causality through an error correction mechanism. Results obtained using VAR modelling techniques are compared to those using an ARDL model. While results lend support to existing trade, macroeconomic and developmental linkages and effects between and within the countries, there is some evidence for the presence of a regional factor common to African Emerging Markets that explains causality from Namibia to South Africa. The results support the view that institution building has progressed, which is considered to be a valuable contribution to growth promotion policies in SSA and market integration throughout financial markets in the SADC community. 相似文献
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The use of research and development (R&D) spending as an empirical proxy for managerial discretion, information asymmetry and growth opportunities, is pervasive in empirical corporate finance research. Underlying this is the implicit assumption that firms choose levels of R&D to maximize value, given firm and industry characteristics. An alternative framework views the level of R&D spending as subject to idiosyncratic behavior as managers myopically manipulate R&D expenditures to meet short-term earnings goals. Using aggregate firm and industry level data, we find evidence consistent with the view that R&D is determined by firm and industry characteristics. Time invariant firm and industry fixed effects explain most of the cross-sectional variation in observed R&D spending, while time-varying factors like size, profitability, or market-to-book explain little of the cross-sectional variation. We find that R&D spending continues to grow faster than advertising and capital expenditures. We also find no evidence of managerial myopia as corporate aggregate R&D expenditures are growing faster than aggregate profitability and the number of firms that undertake R&D has increased over the period from 1976 to 2010. 相似文献
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Colin Thirtle Lin Lin Lin Jim Holding Lindie Jenkins Jenifer Piesse 《Journal of Agricultural Economics》2004,55(2):343-366
This paper reports the results of a study of total factor productivity (TFP) growth in UK agriculture, from 1953‐2000. It shows that prior to 1984 TFP grew at 1.68% per annum and after that date at only 0.26%. International comparisons show that the UK has fallen far behind the leading EU countries. Yield growth declined even more and only labour productivity continues to grow rapidly. In part, the result is due to better data that incorporates more quality adjustment, but the real decline can be explained mainly by cuts in R&D, less patents, less growth in farm size and the demise of public extension. There are other negative factors, which have not been quantified, including asset fixity, convergence and ozone pollution, and a background argument that recent growth rates cannot be sustained. 相似文献
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Given the potential implications of market structure for asset pricing, this paper examines the structural and institutional features of the Hong Kong equity market and their relevance to explaining market behaviour. It was found that the Hong Kong market appears less perfect and hence less efficient than their counterparts in the more developed economies, such as the USA and the UK, so that market disequilibrium and asset mispricing might have occurred. This paper adds value to the literature as the findings provide an institutional framework for analysing and explaining the results from empirical asset pricing work, past and future, on the Hong Kong market. This has far-reaching implications for financial decisions. 相似文献