A Jackknife Method for Estimation of Variance Components

This paper concerns a method of estimation of variance components in a random effect linear model. It is mainly a resampling method and relies on the Jackknife principle. The derived estimators are presented as least squares estimators in an appropriate linear model, and one of them appears as a MINQUE (Minimum Norm Quadratic Unbiased Estimation) estimator. Our resampling method is illustrated by an example given by C. R. Rao [7] and some optimal properties of our estimator are derived for this example. In the last part, this method is used to derive an estimation of variance components in a random effect linear model when one of the components is assumed to be known.     

Different or Equal Treatment? Donor Priority Strategy and Fundraising Performance Assessed by a Propensity Score Matching Study

Many nonprofit organizations apply a priority strategy to their donors instead of treating donors equally. The underlying assumption of this strategy is that different and preferential treatment of donors according to their donation amount positively affects fundraising performance. We conducted a propensity score matching study to analyze the fundraising strategies of seventy‐three cultural organizations in Germany. The empirical findings are discussed and complemented by qualitative data from twenty interviews with fundraising managers and private donors. The results show that, in terms of fundraising performance, nonprofit organizations that apply a donor priority strategy outperform organizations that treat donors equally. A donor priority strategy ultimately leads to a 125 euro higher total revenue per donor and an 87 euro higher profit per donor due to cost savings via better use of fundraising resources.     

Eroding patriarchy: the co-evolution of women's rights and emancipative values

Some scholars find that top-down improvements in women's rights increase societies' value of gender equality at the grassroots, creating pressure for more adoption and enforcement. Others claim that the extension of women's rights is strongly dependent on value change at the grassroots, operating largely as a bottom-up process. We find that top-down and bottom-up dynamics are mutually reinforcing, creating a co-evolutionary dynamic in women's empowerment. We evaluate the rights/values dynamic with data on as many countries as possible, trace their changes over the longest time span available, and analyze their reciprocal relationship in both directions of impact. This is the first analysis that is at the same time (1) comparative across a diverse, global set of nations; (2) dynamic in looking at change in rights and values over time; (3) bidirectional in analyzing the interplay in both directions of impact; and, (4) controlled for relevant ‘third’ changes.     

Keeping up with the Neighbors: Social Interaction in a Market Economy

We consider a world in which individuals have private endowments and trade in markets while their utility is negatively affected by the consumption of their neighbors. Our interest is in understanding how the social structure of comparisons, taken together with the familiar fundamentals of the economy (endowments, technology, and preferences), shapes equilibrium prices, allocations, and welfare. We show that equilibrium prices and consumption are a function of a single network statistic: centrality. An individual's “centrality” is given by the weighted sum of paths of different lengths to all others in a social network. In particular, prices are proportional to the sum of centralities, and an individual's consumption depends on how central she is relative to others in the network. Inequalities in wealth and connections reinforce each other in markets: A transfer of resources from less to more central agents raises prices. As segregated communities become integrated, the poor lose while the rich gain in utility! (JEL: D5, D6, D85)     

Community reactions to campaigns addressing crystal methamphetamine use among gay and bisexual men in New York City

Crystal methamphetamine (aka "crystal meth") use with high-risk sex has become an emerging health problem for gay and bisexual men in New York City since the late 1990s. Public health campaigns were eventually developed to encourage gay and bisexual men to avoid or reconsider using crystal meth. Reactions to three campaigns were measured with a cross-sectional survey administered in 2004. Among an ethnically-diverse sample of 971 gay and bisexual men, 61.8% reported seeing the campaigns. Those who reported ever using crystal meth, recent use, and recent use with sex were significantly more likely to have seen the campaigns. In general, white men, HIV-negative men, and men not currently using crystal meth responded more positively to the campaigns than their counterparts; yet, more men of color reported having discussions with partners and friends about their crystal use as a result of these campaigns. Implications for researchers and practitioners are discussed.     

Venture capital and risk perception

This study extends the current state of research on venture capital (VC) determinants by introducing a behavioral perspective. We focus on individuals’ risk perception and connect it to Hofstede’s cultural dimensions of individualism and uncertainty avoidance. Individualism is related to overoptimism and uncertainty avoidance is related to overcaution, and hence affect the perception of risk. In a cross-country empirical analysis with 49 countries, we find that individualism is positively associated with VC activity, whereas uncertainty avoidance is negatively associated with VC activity. Our results are robust to controlling for other determinants as well as using other proxies of VC activity, other time periods, and subsamples of countries.     

A Cross-National Perspective on Unemployment and First Births

This article investigates the impact of unemployment on the likelihood of having a first child. Using micro-data from the European Community Household Panel, I apply event history methods to analyze first-birth decisions in France, West Germany, and the UK (1994?C2001). The results highlight weak negative effects of unemployment on family formation among men, which can be attributed to the inability to financially support a family. Among women, unemployment exerts a positive effect on the propensity to have a first child in Germany and the UK, where institutional settings aggravate work?Cfamily conflicts. Unemployment increases the likelihood of family formation among women with a moderate or low level of education. This does not, however, generally apply to French women or to highly educated women in Germany and the UK, who, when unemployed, favor a quick return to work over motherhood.