对于 econ_sit 和 educ_cat 之间的每次交互,我已经毫无问题地运行了这个回归,并且我得到了 4 个系数。Econ_sit 是一个连续变量,educ_cat 是一个从 1 到 6 的分类变量。我怎样才能以一种好的方式仅为交互项绘制系数?
model_int_f <- felm(satis_gov_sc ~ econ_sit*factor(educ_cat) + factor(benefit) + econ_neth + age + gender + pol_sof
| factor(wave) + factor(id) # Respondent and time fixed effects
| 0
| id, # Cluster standard errors on each respondent
data = full1)
summary(model_int_f)
Call:
felm(formula = satis_gov_sc ~ econ_sit * factor(educ_cat) + factor(benefit) + econ_neth + age + gender + pol_sof | factor(wave) + factor(id) | 0 | id, data = full1)
Residuals:
Min 1Q Median 3Q Max
-0.58468 -0.04464 0.00000 0.04728 0.78470
Coefficients:
Estimate Cluster s.e. t value Pr(>|t|)
econ_sit 0.1411692 0.0603100 2.341 0.01928 *
factor(educ_cat)2 0.0525580 0.0450045 1.168 0.24292
factor(educ_cat)3 0.1229048 0.0576735 2.131 0.03313 *
factor(educ_cat)4 0.1244146 0.0486455 2.558 0.01057 *
factor(educ_cat)5 0.1245556 0.0520246 2.394 0.01669 *
factor(educ_cat)6 0.1570034 0.0577240 2.720 0.00655 **
factor(benefit)2 -0.0030380 0.0119970 -0.253 0.80010
factor(benefit)3 0.0026064 0.0072590 0.359 0.71957
econ_neth 0.0642726 0.0131940 4.871 1.14e-06 ***
age 0.0177453 0.0152661 1.162 0.24512
gender 0.1088780 0.0076137 14.300 < 2e-16 ***
pol_sof 0.0006003 0.0094504 0.064 0.94935
econ_sit:factor(educ_cat)2 -0.0804820 0.0653488 -1.232 0.21816
econ_sit:factor(educ_cat)3 -0.0950652 0.0793818 -1.198 0.23114
econ_sit:factor(educ_cat)4 -0.1259772 0.0692072 -1.820 0.06877 .
econ_sit:factor(educ_cat)5 -0.1469749 0.0654870 -2.244 0.02485 *
econ_sit:factor(educ_cat)6 -0.1166243 0.0693709 -1.681 0.09279 .
---
Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
Residual standard error: 0.1161 on 11159 degrees of freedom
(23983 observations deleted due to missingness)
Multiple R-squared(full model): 0.8119 Adjusted R-squared: 0.717
Multiple R-squared(proj model): 0.00657 Adjusted R-squared: -0.4946
F-statistic(full model, *iid*):8.557 on 5630 and 11159 DF, p-value: < 2.2e-16
F-statistic(proj model): 55.38 on 17 and 5609 DF, p-value: < 2.2e-16
这是我的数据的样子:
$ id : num 1 1 1 1 2 2 2 2 3 3 3 3
$ wave : chr "2013" "2015" "2016" "2017" ...
$ satis_gov_sc: num 0.5 0.4 0.4 0.6 0.6 0.5 0.6 0.7 0.7 0.7 ...
$ econ_sit : num NA NA 0.708 0.75 0.708 ...
$ educ_cat : num 5 5 5 5 5 6 6 6 6 6 ...
$ benefit : num 3 3 3 3 3 3 3 3 3 3 ...
$ econ_neth : num NA 0.6 0.6 0.7 0.7 0.5 0.4 0.6 0.8 0.7 ...
$ age : num 58 60 61 62 63 51 53 54 55 56 ...
$ gender : num 1 1 1 1 1 1 1 1 1 1 ...
$ pol_sof : num 1 1 1 0.8 1 1 1 1 0.8 1 ...
我尝试plot_model
使用以下代码简单地运行:
plot_model(model_int_f, type = "pred", terms = c("econ_sit", "educ_cat"))
但是我只得到错误,因为该felm
函数与“pred”不兼容:
Error in UseMethod("predict") :
no applicable method for 'predict' applied to an object of class "felm"
关于如何绘制交互项的任何建议?
提前致谢!