求问R语言分位数回归的wald检验具体代码是什么?
rq_result1 <- rq(mydata$INNO ~ SB+mydata$Fixed+mydata$Roa+mydata$Roe+mydata$Fcr+mydata$Shrcr+mydata$Age+mydata$Size, tau=c(0.1, 0.5, 0.9))
rq_result2 <- rq(mydata$INNO ~ SB+I(SB^2)+mydata$Fixed+mydata$Roa+mydata$Roe+mydata$Fcr+mydata$Shrcr+mydata$Age+mydata$Size, tau=c(0.1, 0.5, 0.9))
rq_result3 <- rq(mydata$INNO ~ bs(SB,df=7)+mydata$Fixed+mydata$Roa+mydata$Roe+mydata$Fcr+mydata$Shrcr+mydata$Age+mydata$Size, tau=c(0.1, 0.5, 0.9))
求这三个模型分别的wald检验。