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Chih-chiang Yang 《Quality and Quantity》2007,41(6):831-849
The paper proposes a general framework for modeling multiple categorical latent variables (MCLV). The MCLV models extend latent
class analysis or latent transition analysis to allow flexible measurement and structural components between endogenous categorical
latent variables and exogenous covariates. Therefore, modeling frameworks in conventional structural equation models, for
example, CFA and MIMIC models are feasible in the MCLV circumstances. Parameter estimations for the MCLV models are performed
by using generalized expectation–maximization (E–M) algorithm. In addition, the adjusted Bayesian information criterion provides
help for model selections. A substantive study of reading development is analyzed to illustrate the feasibility of MCLV models. 相似文献
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In this paper we use log-linear models with latent variables to estimate and compare the structure of job characteristics and their relation to positions in the Goldthorpe class schema for male and female employees. We proceed by estimating latent class models of job attributes and then evaluate the degree of similarity in these models between men and women. Sex differences in the patterns of association between the various latent types of job attribute and between those attributes and the Goldthorpe class schema are then assessed. The structure of job attributes is found to be generally similar for men and women; and the Goldthorpe schema is shown to be a similarly effective predictor of these attributes for both sexes. The class structure of employment relations is therefore argued to be equivalent across the sexes, so confirming the generality of class relations as conceptualised by Goldthorpe and his colleagues. 相似文献
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定性分析和定量分析是经济学研究的两种基本手段。前者是对经济事物本质及其属性的分析;后者是对经济事物进行量的考察。学术界对两者存在较严重的分歧,以致形成不同学派的论战;文章就定量分析与定性分析的发展及其发展过程中的争论和融合进行研究,得出结论:经济学的科学性和人文性决定了经济学研究方法必须做到定性分析和定量分析相结合。 相似文献
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Mao Hong & Luo Shou Chen 《Review of urban and regional development studies : RURDS : journal of the Applied Regional Conference》2001,13(2):163-172
The main determinants of foreign direct investment in China are analyzed quantitatively and dynamically based on Dunning's eclectic theory and empirical models corresponding to location-specific advantages, ownership-specific advantages and internalization advantage. More specifically, the correlation between each OLI variable and FDI is tested and explained in detail. It is concluded that monopolistic advantages of technology and management experience of foreign investors along with China's low labor cost and great market potential might be important factors attracting FDI in China. In addition, using an internal market to establish a network of international production might also be an important determinant for foreigners to directly invest in China. Others might include searching for attractive yields available in equity investment, devaluation of the Chinese currency, distance, culture and global business strategies. 相似文献
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通过对某钢厂8万m3转炉煤气柜采用道化学法定量评估火灾风险,采用事故树法对煤气柜可能发生事故的风险进行了分析,并对转炉煤气泄漏和蒸汽云爆炸进行了模拟计算. 相似文献
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Quality & Quantity - Some methodologists take the search target of Qualitative Comparative Analysis (QCA) to be causal INUS-conditions, others contend that QCA should instead be used to search... 相似文献
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The psychometric literature contains many indices to detect aberrant respondents. A different, promising approach is using ordered latent class analysis with the goal to distinguish latent classes of respondents that are scalable, from latent classes of respondents that are not scalable (i.e., aberrant) according to the scaling model adopted. This article examines seven Latent Class models for a cumulative scale. A simulation study was performed to study the efficacy of different models for data that follow the scale model perfectly. A second simulation study was performed to study how well these models detect aberrant respondents. 相似文献
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根据从定性到定量的综合集成理论,分析了电子政务绩效评估的复杂性。基于绩效参考损型(PRM模型)改进的评估指标,建立了将三角模糊数、语言属性,绩效与风险综合评价集成的科学评估体系,最后验证其科学性和有效性。 相似文献
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Aymo Brunetti 《Journal of economic surveys》1997,11(2):163-190
The recent boom in cross-country growth analysis has renewed the empirical interest in political sources of economic growth. A large number of studies have tested political variables in growth regressions and a very heterogenous set of variables has been proposed to measure economically relevant differences in the political systems of countries. This paper distinguishes five categories of relevant political variables: democracy, government stability, political violence, policy volatility, and subjective perception of politics. For each of these categories, the specification, testing method, and results of the most relevant studies are presented and are critically discussed. The paper concludes that measures of democracy are least successful and measures of policy volatility and subjective perception of politics most successful as explanatory variables in cross-country growth regressions. 相似文献
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A decision model for selection using analytic hierarchy process (AHP), however, they did not consider interdependence property but consider independence property among alternatives or criteria. It could become inadequate in measurement of actual performance of the decision process. In order to reduce the decision gap, this paper considers when independence among different elements of a system assumption is violated and takes into account the degree of the interdependence among them. The fuzzy analytic network process (FANP) approach with agile theory is developed to apply in analyzing the new service development in the wholesale center. The FANP could not only offer a hierarchy framework more efficiency and accuracy but also improve human judgment on the importance of requirements involving imprecise and vague. The technique has proved useful for comparing the importance among the determinants of agile for new service development in decision maker’s mind, including agile cost, time, robustness and scope. The empirical result points out that “Diverse designs” of new service development is the best choice for the wholesale center, following as “Service extended” and “Technological core”. 相似文献
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This article aims at investigating how quantitative and qualitative (indirect) network effects impact pricing and trading decisions on a Business‐to‐Business marketplace. Using an original data set collected on MFG.com, one of the most prominent B2B platforms in the U.S.A., we find that the market share of a marketplace depends on both the quantity and quality of suppliers, but that quality effects tend to substitute for quantity effects as the size of the marketplace increases. These results suggest that while the quantity of suppliers on board is crucial during the early stage of a marketplace, supplier quality matters much more in the mature stage. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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Taran Fæhn 《Economic Systems Research》2002,14(1):35-57
Along with a de-escalation of tariffsin most industrialized countries, a wide range of Non-Tariff Barriers (NTBs) has been developed. NTBs are more challenging to study than tariffsbecause they are more difficult to detect and measure, and because the qualitative functioning of NTBs varies according to their design. In particular, equivalent tariff rate estimates on import quantity restrictions will endogenously react to domestic market shifts, for instance as a result of shifts in other commercial policy measures. Besides emphasizing the quantitative dominance of NTBs to tariffs in the Norwegian trade policy system, this study of Effective Rates of Protection clearly illustrates that it may be critical for trade policy studies to model qualitatively the interdependency between different policy measures. 相似文献
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In this paper we find a new test of goodness of fit in the case of discrete random variables. The main advantage of the methodology proposed in this paper relies on the fact that given the sample, we can control the probability of the type I error, that is α, and then find the exact value of the probability of the type II error, β, associated, in some cases. The results are not asymptotic, but exact. Also a conditional test for two alternatives is obtained. We also include some simulations in order to check the power of the procedures.Mathematics Subject Classification (2000) Primary 62G10 · 62B05 · Secondary 62E10 相似文献
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Premporn Khemavuk Maruf Hasan 《现代会计与审计》2014,(6):701-707
This research aims to validate a structural equation modeling (SEM) model for measuring warehouse performance using data from an international company in Australia (company G). Moreover, a methodological triangulation method was also adopted to test whether different methodological approaches produce convergent findings about warehouse performance measurement (WPM). These three different methods are the SEM model, the multiple case research study, and validation of the SEM model using data from 80 companies in Thailand and a company in Australia. With the results from the triangulation method, it is obvious that the SEM model can be used to measure the performance of warehouses in Thailand and Australia. Since the SEM model consists only of significant indicators, it is more appropriate than company G's scorecard. Furthermore, the SEM model can overcome the limitations of traditional models by allowing companies to compare their performance over time. 相似文献
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风险概念及其数量刻画 总被引:22,自引:0,他引:22
风险广泛地存在于各个领域,但人类对风险的认识不尽一致。目前国内外学术界对风险还没有形成公认的、统一的定义。本文对风险的各种解释进行总结,归纳出几种不同的学说观点,并对各种学说的观点进行了评述和数量刻画。 相似文献