This statistical and research supplement to the 2000-01 "Occupational Outlook Handbook" presents detailed, national, comprehensive statistics used in preparing the handbook. It also discusses recent research results and other topics valuable to training officials, education planners, vocational and employment counselors, job-seekers, and others interested in occupational information. Each topic is addressed separately in five chapters. Chapter 1 surveys secondary job data from the Current Population Survey that now are included in total employment estimates, while Chapter 2 presents detailed information about all occupations in the national industry-occupation matrix. In addition to statistics on employment and employment changes, growth rates, job openings, and self-employed workers, rankings from very low to very high for a number of variables are provided in a table in this chapter. The chapter also identifies the most significant source of education or training category designated for each occupation. Chapter 3 presents information about the factors affecting each of these categories. The concept of replacement needs is discussed in Chapter 4. The chapter defines what the data on replacement needs represent and describes how they were prepared. Projected replacement rates and estimates of replacement needs for 1998-2008 also are included. Finally, data from the National Center for Education Statistics on completions of institutional education and training programs by field of study appear in Chapter 5. The data described in the report are presented in 11 tables and a figure. (KC)