نتایج جستجو برای: tooth attrition

تعداد نتایج: 91802  

2003
Michael Karlberg

We live in a culture of contest and protest. Our economic, political, and legal institutions are structured as contests. Our efforts to reform these institutions frequently are characterized by protest. This article examines the social and ecological implications of this culture of contest and protest. It begins by demonstrating that our economic, political, and legal institutions form an integ...

2010
Maksymilian Kwiek

This paper considers a multi-unit ascending auction with two players and common values. A large set of equilibria in this model is not robust to a small reputational perturbation. In particular, if there is a positive probability that there is a type who always demands many units, regardless of price, then the model has a unique equilibrium payo¤ pro…le. If this uncertainty is only on one side,...

2002
Marco Francesconi

This paper performs an evaluation of the data collected in the sixth wave of the BHPS on childhood family structure. After comparing such data with a large number of studies using external sources, we find that the BHPS overestimates the proportion of people who report an experience of life in a nonintact family during childhood by about 12%. Although an explanation based on recall error that d...

2010
Michael Kremer Edward Miguel Rebecca Thornton

We study a randomized evaluation of a merit scholarship program in which Kenyan girls who scored well on academic exams had school fees paid and received a grant. Girls showed substantial exam score gains, and teacher attendance improved in program schools. There were positive externalities for girls with low pretest scores, who were unlikely to win a scholarship. We see no evidence for weakene...

2000
Harvey F. Hoffman

1 Harvey F. Hoffman, Technical Career Institutes, 320 West 31 Street, New York, NY 10001 [email protected] Abstract Using a qualitative research methodology, this study explored reasons nontraditional students selected and entered an engineering program of study leading to a baccalaureate degree and then withdrew before graduation. The study focused on career oriented adult learners involved ...

2004
ALASTAIR SMITH ALLAN C. STAM

A model of bargaining embedded within a random-walk model of warfare is developed. The conflict model contains aspects of both lottery-based and war-of-attrition models of conflict. Results show that future disputes are less likely to lead to armed conflict following long rather than short wars. Furthermore, should a subsequent dispute lead to armed conflict, the higher the cost and the longer ...

2008

Staffing the nation’s schools with well-qualified teachers has long been a prominent issue in elementary and secondary education (Wayne and Youngs 2003). Mathematics and science teachers are of particular interest because mathematics and science are core subjects in both elementary and secondary public schools. These subjects continue to attract attention as the need for individuals entering th...

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