This report describes a study conducted to determine if there were any applicable effects from private-school competition on public-school student achievement in North Carolina. The study examined multiple student outcomes, including elementary and secondary student achievement results, student dropout rates, and high school student achievement results analyzed by ethnicity. The data were aggregated at three levels (district, county, and unified county) to account for educational market particulars and competition between school districts in those areas where additional public-school choice was available. The study found no indication of significant private-school competition effects for North Carolina public-school outcomes. Following an introduction, the report provides a brief review of previous research. The next section discusses the role of competition and provides two possible mechanisms through which private-school competition might influence public-school behavior. Subsequent sections highlight the basic empirical issues involved in empirical estimations of private-school competition on public-school outcomes; explain the particular methodology and model used in the study; discuss the data; analyze the results; and discuss the implications of the findings as well as the limitation of the study for the larger body of research. (Contains 121 references.) (WFA)