案例剖析--多元线形模型(国外英文资料).docVIP

案例分析--多元线形模型(国外英文资料) The empirical analysis of the effect of farmers income -- - from the yunnan honghe household data First, the problem description of the research The effect of household income: material capital? Human capital? Second, model design In the linear assumption, Variables: (1) study variables: the income of farmers and the per capita net income of rural households, the net income of farmers and the logarithmic of productive fixed assets (2) material capital: cultivated land and productive fixed assets (3) human capital: the experience of the laborer, the degree of education, the labor experience = the average age of the farmers labor force - the average is the level of education - 6 (4) family factors (control variables) : labor force, population Three, sample data specification Income labor land aset Min. : 8.48 Min. : 1.000 Min. : 0.000 Min. : 0 1st Qu. : 2,0001st Qu. : 2.600 1st Qu Median: 2857.14:3.000 Median: 4.900 Median: 6000 Mean: 3753.47 Mean: 6.702 Mean: 10729 329 394 3rd Qu. : 12700 Max. : 54524.62 Max. : 8.000 Max. : 51.000 Max. : 500000 Age edu popu Min. : 18.00 Min. : 1.00 Min 1st Qu. : 3.000 Median: 36.33 Median: 7.50 Median: 4.000 Mean: 37.02 Mean: 4.319 3rd, 3rd, 3rd, 3rd, 3rd, 3rd Max. : 52.00 Max. : 15.00 Max. : 13.000 Dim (s) [1], 2888 7 R program: S = read. CSV ( Sam. CSV , header = TRUE) The summary (s) Exper = s $age - s $edu - 6 R program: The attach (s) Hist (income, freq = FALSE) Lines (income, col = 4) So, log (income), freq = FALSE Lines (log (income), col = 4) Model estimation and inspection Model R program: S_lm = lm (income) ~ exper + edu + land + log (1 + aset) + I (popu/labor), data = s) The summary (s_lm) The Call: Lm (formula = log (income) ~ exper + edu + land + log (1 + aset) + Popu + labor, data = s Residuals: Min 1Q Median 3Q Max -6.1992-0.3392 0.0360 0.4217 2.6728 Coefficients: Estimate d. Error t value Pr ( | t |) (Intercept) 7.111715 0.133526 53.261 2e - 16 * * * Exper 0.012545 0.002513 4.991 6.35e-7 * * Edu