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排序方式: 共有823条查询结果,搜索用时 15 毫秒
31.
Md. Ezazul Islam Md. Rafiqul Islam A B M Shawkat Ali 《The Review of Socionetwork Strategies》2016,10(2):105-123
Security of Big Data is a huge concern. In a broad sense, Big Data contains two types of data: structured and unstructured. Providing security to unstructured data is more difficult than providing security to structured data. In this paper, we have developed an approach to provide adequate security to unstructured data by considering types of data and their sensitivity levels. We have reviewed the different analytics methods of Big Data to build nodes of different types of data. Each type of data has been classified to provide adequate security and enhance the overhead of the security system. To provide security to a data node, and a security suite has been designed by incorporating different security algorithms. Those security algorithms collectively form a security suite which has been interfaced with the data node. Information on data sensitivity has been collected through a survey. We have shown through several experiments on multiple computer systems with varied configurations that data classification with respect to sensitivity levels enhances the performance of the system. The experimental results show how and in what amount the designed security suite reduces overhead and increases security simultaneously. 相似文献
32.
Norma Mansor Muhammad Asri Mohd Ali 《International Journal of Human Resource Management》2013,24(3):506-515
This note reports on an exploratory study examining the relationships between rules on employee behaviour and on management discretion and other aspects of organizations in Malaysia. Using the data from thirty-five Malaysian organizations, the authors highlight the differences between the implications of the rules for the two groups and their relationships with company performance. 相似文献
33.
Dollar-denominated deposits and loans could increase financial fragility in emerging market banking systems. This currency mismatch does not only increase banks' currency risk when the proportion of dollar-denominated loans with respect to local-denominated loans increases but also it increases their clients' default risk if depreciation occurs. This paper investigates the profitability of 36 dollarized banking systems. Results suggest that after controlling for some macroeconomic and institutional variables, dollarization, as the currency mismatch hypothesis suggests, depresses bank performance and lowers bank profitability. Results also show that the effect of institutions more than offsets the negative impact of dollarization on banks' profitability. 相似文献
34.
Affinity card programs have become popular in recent times and account for one fifth of all credit card accounts. There is no research that links affinity card programs to customer profitability. Moreover, little is known about what type of affinity card programs would lead to higher profit. Using a large proprietary dataset we answer the above questions. We also apply propensity score matching, a relatively new technique, to control for selection bias in addressing the above issues. Contrary to previous research and common belief, we show that affinity card customers are no more profitable than non-affinity card holders. We also show that sports-based affinity programs are the least profitable and surprisingly, alumni-based affinity programs also do poorly relative to other types of affinity. On the positive side, affinity card customers are lower risk and help to lower the average risk of the portfolio of customers. 相似文献
35.
Ali Nejadmalayeri 《Journal of Economics and Business》2011,63(5):503
By virtue of creating asset-liability mismatch, conventional long-term, fixed-rate mortgage loans inherently introduce excess interest risk to the financial systems. Considering that inflation is in part the reason for this excess interest risk, it seems natural to redesign mortgages in such a way that over time mortgage payments could, at least in part, reflect inflation. In this paper, I show that by allowing payments to adjust to inflation, particularly that of wages, by incorporating a prespecified growth rate into mortgage payments, mortgage loans become more affordable while bank interest spreads become less volatile, making the banking system less unstable. 相似文献
36.
In this paper, we show that the 1986 Mitra–Wan result establishing asymptotic convergence of maximal programs to the unique golden-rule forest in the case of undiscounted, strictly concave felicity functions can be strengthened, in the same setting, to the uniform asymptotic convergence of optimal programs to the unique golden-rule forest. We work with a notationally reformulated version of the model that may have independent interest. 相似文献
37.
The objective of this study is to investigate ethnocentric and/or regiocentric behaviour of Azeri and Kyrgyz consumers. In particular, the study focuses on how ethnocentrism explains consumers' attitudes, intentions and actual purchasing behaviour towards products from major sourcing countries. Data for the study were collected through personal interviews in four districts of Greater Bishkek: the capital city of Kyrgyz Republic, and Baku, the capital city of Azerbaijan. Survey findings lend greater support to earlier studies conducted in the USA, Western and Eastern Europe and Japan. Non-ethnocentric Kyrgyz and Azeri consumers have significantly more favourable belief structures, attitudes, intentions and the resultant purchasing behaviour regarding imported products compared to their ethnocentric Azeri and Kyrgyz consumer counterparts. The findings of the study offer important research, public policy and managerial implications for companies, government agencies and international donor agencies alike who are either operating in the region or contemplating an entry in the future. Foreign companies may use pan-regional marketing strategies and may be able to standardise their products and marketing strategies in the region, since consumers have identical and/or very similar use behaviour and uses for the products and services. 相似文献
38.
House Prices and Inflation 总被引:3,自引:0,他引:3
The present paper examines the long-run impact of inflation on homeowner equity by investigating the relationship between house prices and the prices of nonhousing goods and services, rather than return series and inflation rates as in previous empirical studies on the inflation hedging ability of real estate. There are two reasons for this methodological departure from prior practice: (1) while the total return on housing cannot be accurately measured, the total return on housing is fully reflected in housing prices, and (2) given that using returns or differencing a time series leads to a loss of long-run information contained in the series, valuable long-run information can be captured by using prices. Also, unlike previous related studies, we exclude housing costs from goods and services prices to avoid potential bias in estimating how inflation affects housing prices. Monthly data series are collected for existing and for new house prices as well as the consumer price index excluding housing costs for the period 1968–2000. Based on both autoregressive distributed lag (ARDL) models and recursive regressions, the empirical results yield estimated Fisher coefficients that are consistently greater than one over the sample period. Thus, we infer that house prices are a stable inflation hedge in the long run. 相似文献
39.
Timing is becoming a new source of competitive advantage. The business press extols the benefits of faster product development. This paper examines whether competitive advantage can be gained by reducing development time across all types of new products or whether this advantage is restricted to certain types of new products. It proposes that product innovativeness moderates the relationship between development time and initial market performance. A survey of 110 small manufacturing firms in computer related industries supports the hypothesis. The survey findings indicate that a firm must guard against over- or under-development of the new product since product innovativeness was found to influence the impact of development time on market performance. The implications for managers are: beware of bringing a new product that is too much, too early or too little, too late. 相似文献
40.
The purpose here is to assess empirically the quasi-supply side model of the firm developed in the paper by Ashton et al. (2004 ) by testing the prediction of the model that the evolution of a firm's debt to equity ratio will be compatible with a non-linear (target adjustment) process whose underlying probability density function possesses no convergent moments. Using a thirty-two-year history of the debt to equity ratio for each of ninety 'mature' United Kingdom firms, a non-parametric estimation procedure shows that the debt to equity ratio evolves in terms of a process which is largely consistent with the predictions of this model. In particular, the evolution of the debt to equity ratio is compatible with a 'long (fat) tailed' density function with no convergent moments. This has the important implication, supported by our empirical analysis, that the linear dynamic models which characterize empirical work in this area will be mis-specified and will return inconsistent and temporally unstable estimates of the target adjustment process as a consequence. 相似文献