Macro-, meso-, and micro-analyses on resigning and changing jobs in forestry

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Because some forestry workers are not classified as "Forestry" in the National Population Census, we newly estimate the aggregate number of forestry workers as 71, 906. The cohort analysis is carried out into the effects of age, period, and cohort on the change of the number of the forestry workers. The workers in the 1946-1950 birth year cohort increase even in their 40s and 50s(the cohort effect). From 1960 to 1965, workers decrease in all birth year cohorts(the period effect). The differences of numbers of workers among the cohorts over 60s progressively shrink, and almost run out in 70s(the age effect). The case study is done in Tenryu Area, Shizuoka Pref., the forestry area, and the Tajima Area, Hyogo Pref., not the forestry area. The data of the workers in the forest cooperatives in those areas were collected. The trial wage function in Tajima area indicates only the forestry experience in the human capital variables works on the wage increase, although even its estimate is not so high. The questionnaire to all the cooperatives was also done. The analysis is now in progress.