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Variables Techniques (variable + techniques)

Distribution by Scientific Domains
Business, Economics, Finance and Accounting60%

Kinds of Variables Techniques

  • instrumental variable techniques
    		•

    Selected Abstracts

    Intergenerational Welfare Participation in New Zealand

    AUSTRALIAN ECONOMIC PAPERS, Issue 3 2003
    Tim Maloney
    New Zealand panel data, which provide extensive information on the benefit histories of parents and their children, are used to estimate an intergenerational correlation coefficient in social welfare dependency. Recent estimation techniques for addressing issues of measurement error are applied to this analysis. The long-term benefit histories of parents and instrumental variable techniques provide useful lower and upper-bound estimates of the true intergenerational correlation. Our results suggest that the true correlation coefficient between the welfare participation of parents and their offspring is somewhere between one-third and two-thirds, but probably much closer to the lower limit in this range. Approximately one-quarter of this effect appears to operate through the lower educational attainment of children reared in families receiving social welfare benefits. [source]

    Applications of Taxometric Methods to Problems of Comorbidity: Perspectives and Challenges

    CLINICAL PSYCHOLOGY: SCIENCE AND PRACTICE, Issue 4 2001
    Irwin D. Waldman
    We share Meehl's view that taxometric procedures hold considerable promise for elucidating questions regarding psychiatric comorbidity. Drawing on examples from the domain of childhood disruptive disorders, we discuss why the issues raised by Meehl are scientifically and pragmatically important and outline several profitable applications of taxometric methods to questions of comorbidity (e.g., estimating the statistical relations between latent taxa). We explain why taxometric methods and other sophisticated latent variable methods are needed to answer such questions and provide examples of how certain statistical methods have been used to make erroneous inferences regarding taxonicity. Several important unresolved issues bearing on the use of taxometric procedures and their application to questions of comorbidity are delineated, including (a) the distributional assumptions of taxometric methods, (b) the construct validation of provisional taxa identified by taxometric analyses, (c) the relation of taxometric methods to other latent variable techniques (e.g., latent class analysis), (d) the potential existence of spurious taxa, (e) the question of "fuzzy taxonicity," and (f) "configural taxa." We conclude with a discussion of analytic methods for characterizing and understanding the covariation between latent dimensions as opposed to taxa. [source]

    Does the Impact of Managed Care on Substance Abuse Treatment Services Vary by Provider Profit Status?

    HEALTH SERVICES RESEARCH, Issue 6p1 2005
    Todd A. Olmstead
    Objective. To extend our previous research by determining whether, and how, the impact of managed care (MC) on substance abuse treatment (SAT) services differs by facility ownership. Data Sources. The 2000 National Survey of Substance Abuse Treatment Services, which is designed to collect data on service offerings and other characteristics of SAT facilities in the U.S. These data are merged with data from the 2002 Area Resource File, a county-specific database containing information on population and MC activity. We use data on 10,513 facilities, virtually a census of all SAT facilities. Study Design. For each facility ownership type (for-profit [FP], not-for-profit [NFP], public), we estimate the impact of MC on the number and types of SAT services offered. We use instrumental variables techniques that account for possible endogeneity between facilities' involvement in MC and service offerings. Principal Findings. We find that the impact of MC on SAT service offerings differs in magnitude and direction by facility ownership. On average, MC causes FPs to offer approximately four additional services, causes publics to offer approximately four fewer services, and has no impact on the number of services offered by NFPs. The differential impact of MC on FPs and publics appears to be concentrated in therapy/counseling, medical testing, and transitional services. Conclusion. Our findings raise policy concerns that MC may reduce the quality of care provided by public SAT facilities by limiting the range of services offered. On the other hand, we find that FP clinics increase their range of services. One explanation is that MC results in standardization of service offerings across facilities of different ownership type. Further research is needed to better understand both the specific mechanisms of MC on SAT and the net impact on society. [source]

    The relation between implied and realised volatility in the Danish option and equity markets

    ACCOUNTING & FINANCE, Issue 3 2001
    Charlotte Strunk Hansen
    We show that the conclusions to be drawn concerning the informational efficiency of illiquid options markets depend critically on whether one carefully recognises and appropriately deals with the econometrics of the errors-in-variables problem. This paper examines the information content of options on the Danish KFX share index. We consider the relation between the volatility implied in an option's price and the subsequently realised index return volatility. Since these options are traded infrequently and in low volumes, the errors-in-variables problem is potentially large. We address the problem directly using instrumental variables techniques. We find that when measurement errors are controlled for, call option prices even in this very illiquid market contain information about future realised volatility over and above the information contained in historical volatility. [source]

    Is there a causal link between currency and debt crises?

    INTERNATIONAL JOURNAL OF FINANCE & ECONOMICS, Issue 4 2006
    Axel Dreher
    Abstract Though currency and debt crises quite often occur simultaneously, the links between these two types of crises are not well understood. We review how currency and debt crises could be related due to common causes, contagion effects from one crisis to the other, and complementary budget financing aspects. In an empirical analysis based on a panel of 80 countries over the period 1975,2000, we first investigate the determinants of each crisis separately. Then we estimate links between both crises employing instrumental variables techniques. We find that, while there is a negative lagged influence of currency crises on debt crises, currency crises significantly increase the risk of contemporaneous debt crises and vice versa. Copyright © 2006 John Wiley & Sons, Ltd. [source]