Challenges in Teaching Short Courses by an Academic Department: The University of Florida Experience

“A Week of Short Courses” is the title given by the Department of Statistics at the University of Florida to its offerings each spring. The offerings are short courses, each lasting 2 1/2 days. The program began in the spring of 1991 with four courses, and has grown to six courses in 1994. During this four-year period the Department of Statistics has faced many challenges that are addressed in this paper.     

Indicators of development in Wisconsin counties: 1970

This research focused on the problem of measuring economic and social ‘development’. Existing theories of economic and social change were used to select important indicators of development. For each indicator, principal components analysis was used to collapse several related variables into a single index. The indexes were labeled economic base, economic growth, personal economic opportunity, health inputs, health status, educational inputs, and educational attainment. In each case, selection of variables and indexes were constrained by two factors: (1) the data had to be available from secondary sources; (2) the selection of the indicators, and the procedure, had to be easily understood and cheaply and quickly repeatable by state or local agency personnel. In general the indexes were consistent with each other and the variables enter into the indexes with the expected sign. The high correlation among the indexes suggests that they may indeed measure some underlying attribute, development. There is no rigorous or absolute measure of development against which to check the validity of the indexes. However, the results have been judged ‘reasonable’ measures of development by the state agency staff and local development groups which have utilized the indexes.     

Break point detection for functional covariance

Many neuroscience experiments record sequential trajectories where each trajectory consists of oscillations and fluctuations around zero. Such trajectories can be viewed as zero-mean functional data. When there are structural breaks in higher-order moments, it is not always easy to spot these by mere visual inspection. Motivated by this challenging problem in brain signal analysis, we propose a detection and testing procedure to find the change point in functional covariance. The detection procedure is based on the cumulative sum statistics (CUSUM). The fully functional testing procedure relies on a null distribution which depends on infinitely many unknown parameters, though in practice only a finite number of these parameters can be included for the hypothesis test of the existence of change point. This paper provides some theoretical insights on the influence of the number of parameters. Meanwhile, the asymptotic properties of the estimated change point are developed. The effectiveness of the proposed method is numerically validated in simulation studies and an application to investigate changes in rat brain signals following an experimentally-induced stroke.     

Health Care in Asia and the Pacific: Increasing the focus on social health insurance

This paper focuses on health insurance reform within the broader frameworks of both social security and health services system development. In most countries in Asia and the Pacific, it is indeed the reform of the health services system, through policy changes in health care financing, that has led to an increased focus on health insurance. The underlying issue in this reform is the shift in responsibility that has taken place in most countries in the region over recent years. In the past, governments were responsible for financing health care for their populations. This shifted to defining, legislating and implementing an appropriate health care financing mechanism, presenting several challenges: to reach universal health insurance coverage through new initiatives for new populations, mainly the informal sector accounting for the majority of the population in almost all these countries; to apply provider payment systems that enable control over costs and the volume of utilization; and to strengthen primary health care as a foundation for rational utilization and more resources for prevention, including prevention of chronic diseases among the ageing population. This approach will require an active partnership between health insurance schemes and government that should reflect the new division of responsibilities to guarantee access to high-quality health care for all.