We study unrepresentative observational data in survival analysis. The first paper focuses on proportional hazards regressionwhen observed subjects have different selection probabilities. Wedevelop methods which are applicable when the selectionprobabilities are unknown but estimated using...

This study focus on the developing of an adventure-based experiential learningprogram (AEP) to address the personal functioning (positive functioning, selfperception, trauma dynamics, relationships and decision making) of youths in thesociety. The methodology based on experiential learning,...

OBJECTIVE: The purpose of this study was to identify hospital organizational characteristics consistently associated with adherence to multiple clinical practice guidelines (CPGs). We examined the relationship between organizational and patient population characteristics and adherence to three...

OBJECTIVE: To identify consistent provision of clinical preventive services, we sought to benchmark all acute care Veterans Affairs Medical Centers (VAMCs) against each other nationally on the basis of multiple evidence-based, performance measures to identify facilities performing consistently...

OBJECTIVE: The purpose of this study was to identify hospital organizational characteristics consistently associated with adherence to multiple clinical practice guidelines (CPGs). We examined the relationship between organizational and patient population characteristics and adherence to three...

Hypotheses were developed to capture the dynamic capabilities that result from interfirm partnerships during the joint new product development (NPD) process -- the ability to build, integrate, and reconfigure existing resources to adapt to rapidly changing environments. These capabilities, in...

Security researchers agree that security control is a difficult to observe credence quality of online services that Internet users cannot easily assess through research or experience. Yet there is evidence that users form perceptions of security control that strongly determine how much trust...

Sexual activity among adolescents is associated with risks such as pregnancy and STDs, and there is substantial policy interest in how peers influence the timing of sexual initiation. This paper measures separate effects for two social mechanisms--peer-group norms and partner availability--using...

This dissertation is a collection of three essays on high school dropout by adolescents and the roll of their siblings in this risky behavior. Dropping out of high school can scar the individual for his entire labor supply period with lower earnings, higher unemployment, and in turn incur...