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David Johnson 《Journal of marriage and the family》2005,67(4):1061-1075
Study of the effect of transitions on individual and family outcomes is central to understanding families over the life course. There is little consensus, however, on the appropriate statistical methods needed to study transitions in panel data. This article compares lagged dependent variable (LDV) and change score (CS) methods for analyzing the effect of events in two‐wave panel data. The methods are described, and their performances are compared both with a simulation and a substantive example using the National Survey of Families and Households two‐wave panel. The results suggest that CS methods have advantages over LDV techniques in estimating the effect of events on outcomes in two‐wave panel data. 相似文献
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Objective . The primary objective of this article is to investigate the "informal" marketplace for domestic servants (maids) in a border community in South Texas (Laredo). Methods . A questionnaire was administered by a household member familiar with the present study who employed at least one maid utilizing the snowball method of sample selection. Usable data (surveys) were collected from 389 individuals—195 maids and 194 employers. Results . For maids, who are overwhelmingly female Mexican nationals, the primary determinant or "push" factor in becoming a maid was economic necessity while the primary "pull" factor was good pay. A large hourly wage differential was uncovered for day maids ($3.44) vis-a-vis live-in maids ($2.61), which was primarily the result of civil status and the possession of documents permitting entry into the United States as determined by a logistic regression. Conclusion . The relative attractiveness of work as a maid in Laredo, Texas reflects the benefit of good pay balanced by the cost of poor employment choice in Mexico. 相似文献
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David Lucas 《Journal of Population Research》1997,14(1):69-76
TheMonthly Returns to the War Office in London are used to calculate death and sickness rates for British troops in Australia and New Zealand. In the first half of the century death rates peak in 1835–39 before declining, and are generally lower than for troops stationed in Britain. The sickness rates show no clear trend, apparently because of the impact of epidemics and war. 相似文献
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The business model has become a popular concept in business and management fields. Yet, it is suffering from a paradox between outstanding popularity and severe criticism, which appears to impede the positive development of the scholarly discourse on the business model concept. Against this background, the purpose of this study is to provide insight into the antecedents of this paradox and to understand their implications for the future development of the concept. The following contributions are made. First, the authors apply a narrative approach to recognizing and interpreting the paradox, and introduce the analysis of syntactics of scholarly discourse as a novel method of investigating management concepts. Second, as a result of elaborating on recurrent themes and tensions in scholarly discourse, the authors extend the literature on business models through theorizing on the core of the concept along the dimensions of classification, constitution and configuration. In particular, they identify the simultaneity of separation and attachment as the main antecedent of the business model paradox. Third, the authors offer implications for further advancing the development of this management concept, and highlight the need for spurring integrative research while at the same time maintaining a plurality of perspectives. 相似文献
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While ethical implications of direct taxation systems have recently received renewed attention, a more veiled scheme remains unnoticed: inflation. We overview the causes of inflation and assess its consequences. Salient wealth redistributions are a defining feature of inflation, as savers and fixed income individuals see a relative wealth reduction. While avoiding this “tax” is difficult in many instances because of the primacy of money in a monetary economy, the tax codes of most developed countries allow avoidance techniques to be employed. We analyze three ways that inflation may be avoided in an attempt to preserve personal wealth, as well as the consequences of such practices. 相似文献
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Wisdom of the crowd and capabilities of a few: internal success factors of crowdsourcing for innovation 总被引:1,自引:0,他引:1
Dirk Lüttgens Patrick Pollok David Antons Frank Piller 《Zeitschrift für Betriebswirtschaft》2014,84(3):339-374
Crowdsourcing has been demonstrated to be an effective strategy to enhance the efficiency of a firm’s innovation process. In this paper, we focus on tournament-based crowdsourcing (also referred to as “broadcast search”), a method to solve technical problems in form of an open call for solutions to a large network of experts. Based on a longitudinal study of six companies piloting this application of crowdsourcing, we identify barriers and sources of resistance that hinder its implementation in firms. Our paper contributes to the state of research by analyzing crowdsourcing on the level of pilot projects, hence providing a workflow perspective that considers the creation of dedicated processes and operations of crowdsourcing. This project level analysis enables the identification of specific challenges managers face when implementing crowdsourcing within an established R&D organization. Following a design science approach, we derive suggestions for organizational interventions to overcome these barriers. We find that dedicated promoter roles strongly contribute to a successful implementation of crowdsourcing, turning pilot projects into an organizational routine. 相似文献