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Theoretical Differences (theoretical + difference)
Selected AbstractsCapital Asset Pricing Model and the Risk Appetite Index: Theoretical Differences, Empirical Similarities and Implementation Problems,INTERNATIONAL FINANCE, Issue 2 2009Marcello Pericoli We perform a thorough analysis of the Risk Appetite Index (RAI), a measure of changes in risk aversion proposed by Kumar and Persaud (2002). Building on Misina's study (2003), we first argue that the theoretical assumptions granting that the RAI correctly distinguishes between changes in risk and changes in risk aversion are very restrictive. Then, by comparing the RAI with a measure of risk aversion obtained from the Capital Asset Pricing Model (CAPM), we find that the estimates are surprisingly similar. We prove that if the variance of returns is sufficiently smaller than the variance of asset riskiness, then RAI and CAPM provide essentially the same information about risk aversion. We also show, however, that RAI and CAPM suffer from exactly the same implementation problems , the main one being the difficulty in measuring ex-ante returns. At high and medium frequencies, the standard method of measuring ex-ante with ex-post returns may generate negative risk aversion and other inconsistencies. Hence, future research is needed to address this problem. [source] Meta-analyses of love scales: Do various love scales measure the same psychological constructs?JAPANESE PSYCHOLOGICAL RESEARCH, Issue 1 2003Masahiro Masuda Abstract: Two statistical meta-analyses synthesized 33 empirical studies which investigated the correlation between relationship satisfaction and two types of love: Erotic Love and Companionate Love, measured by various love scales based on four major theories by Rubin, Lee, Hat,eld, and Sternberg. The results drawn by the Hunter-Schmidt method showed that satisfaction was highly correlated with Erotic Love, but that its correlation with Companionate Love was unclear due to heterogeneity in the total sample of the all Companionate Love studies. A moderator analysis indicated a potential moderator, that is, theoretical differences between Lee's Color Theory of Love and the other three theories. The result suggested that a Companionate Love named "Storge" in the Color Theory should not be mixed up with other friendship-style loves de,ned by other theories as the Storge subscale would measure a different psychological construct. [source] The role of cognition in classical and operant conditioningJOURNAL OF CLINICAL PSYCHOLOGY, Issue 4 2004Irving Kirsch For the past 35 years, learning theorists have been providing models that depend on mental representations, even in their most simple, deterministic, and mechanistic approaches. Hence, cognitive involvement (typically thought of as expectancy) is assumed for most instances of classical and operant conditioning, with current theoretical differences concerning the level of cognition that is involved (e.g., simple association vs. rule learning), rather than its presence. Nevertheless, many psychologists not in the mainstream of learning theory continue to think of cognitive and conditioning theories as rival families of hypotheses. In this article, the data pertaining to the role of higher-order cognition in conditioning is reviewed, and a theoretical synthesis is proposed that provides a role for both automatic and cognitively mediated processes. © 2004 Wiley Periodicals, Inc. J Clin Psychol. [source] Politics Lost, Politics Transformed, Politics Colonised?POLITICAL STUDIES REVIEW, Issue 1 2005Theories of the Impact of Mass Media In recent years, there has been a substantial increase in the literature on the relationship between politics and mass media, mainly in discrete topic areas such as the impact of mass media on electoral behaviour, the emergence of new forms of political communication, or media political economy. At the same time, this diverse literature has often focused on a single general issue, typically characterised in terms of the ,transformation' of politics. Despite this common theme, there has been relatively little attempt to connect and compare the different approaches. Looking at the theoretical differences in the new literature on politics and mass media reveals three perspectives , pluralist, constructivist, and structuralist. These approaches have too often tacitly co-existed, instead of more competitively striving to advance knowledge in the three main topic areas above. [source] | ||||||||||