Using data on more than 27,000 establishments (1983-1999) in the United States, this paper exploits an institutional feature of the union organizing process in order to generate an estimate of the causal effect of unionization on the probability of establishment closure. In the U.S., most establishments become “unionized” as a partial consequence of a secret ballot election among the workers. I...

Blind Source Separation techniques, based both on Independent Component Analysis and on second order statistics, are presented and compared for extracting partially hidden texts and textures in document images. Barely perceivable features may occur, for instance, in ancient documents previously erased and then re-written (palimpsests), or for transparency or seeping of ink from the reverse side...

The topic of unconscious influences on behaviour has long been explored as a means of understanding human performance and the neurobiological correlates of intention, motivation, and action. However, what is relatively unknown is whether subconsciously delivered priming stimuli, with or without rewards, can affect individuals' maximum level of force produced with their best effort. We demonstra...

Direct influence over communication media is a potent resource during electoral campaigns, and politicians have an incentive to gain control of the airwaves to advance their careers. In this article, we use data on community radio license applications in Brazil to identify both the causal effect of incumbency on politicians’ ability to control the media and the causal effect of media control on...

BACKGROUND The Netherlands is one of the frontrunners of eHealth in Europe. Many general practices offer Internet services, which can be used by patients to communicate with their general practice. In promoting and implementing such services, it is important to gain insight into patients' actual use and intention toward using. OBJECTIVE The objective of the study is to investigate the actual ...

The status of children’s acquisition of grammatical categories and in particular of auxiliaries continues to be debated. On the one hand, a number of corpus studies suggest that auxiliaries and similar categories are absent early on (e.g., Wijnen 1996/1997, Schlyter 2003). On the other hand, experimental studies indicate that syntactic competence for functional categories is available to toddle...

Macrocycles are usually barely porous in the solid-state because of their small intrinsic cavity sizes and tendency to close-pack. Here, a heterochiral pairing strategy introduce porosity trianglimine macrocycle co-crystal.

introduction barely (hordeum vulgare) is the fourth most important cereal after wheat, corn and rice. regarding the role of breeding to increase barley grain yield a large number of studies have been done in different countries. however, a few studies have been performed across golestan province, in iran. therefore, this study was conducted to know what barley traits have changed with grain yie...