Adding more variables to F&R 2006

** Playing around with our baseline model F&R 2006, adding and removing variables**

lm1=plm(MDR_lead~MDR+EBIT_TA+MB+DEP_TA+FA_TA+lnTAcpi+IndMed,index="pid",model="within",data=regdtc)
lm2=plm(MDR_lead~MDR+IndMed,index="pid",model="within",data=regdtc)
lm3=plm(MDR_lead~MDR+EBIT_TA+MB+DEP_TA+FA_TA+lnTAcpi+IndMed+Delta_EBIT_TA+Delta_lnTAcpi+Delta_lnSALEScpi,index="pid",model="within",data=regdtc)
lm4=plm(MDR_lead~MDR+EBIT_TA+lnTAcpi+IndMed+Delta_EBIT_TA+Delta_lnTAcpi+Delta_lnSALEScpi,index="pid",model="within",data=regdtc)
stargazer(lm1,lm2,lm3,lm4,type="text",column.labels = c("F&R2006", "AR1", "F&R2006+Growth","AR1+Growth"), font.size = "small", 
                   align = TRUE, 
                   no.space = TRUE,omit.stat=c("f", "ser"))
## 
## ==============================================================
##                               Dependent variable:             
##                  ---------------------------------------------
##                                    MDR_lead                   
##                   F&R2006     AR1    F&R2006+Growth AR1+Growth
##                     (1)       (2)         (3)          (4)    
## --------------------------------------------------------------
## MDR              0.581***  0.604***     0.597***     0.608*** 
##                   (0.004)   (0.004)     (0.004)      (0.004)  
## EBIT_TA          -0.031***             -0.094***    -0.091*** 
##                   (0.003)               (0.004)      (0.003)  
## MB               -0.001***             -0.002***              
##                  (0.0002)               (0.0002)              
## DEP_TA            -0.017                 -0.013               
##                   (0.022)               (0.023)               
## FA_TA            0.050***               0.053***              
##                   (0.005)               (0.005)               
## lnTAcpi          0.018***               0.023***     0.027*** 
##                   (0.001)               (0.001)      (0.001)  
## IndMed           -0.110*** -0.087***   -0.059***    -0.048*** 
##                   (0.011)   (0.012)     (0.012)      (0.012)  
## Delta_EBIT_TA                          -0.098***    -0.097*** 
##                                         (0.003)      (0.003)  
## Delta_lnTAcpi                           0.049***     0.043*** 
##                                         (0.002)      (0.002)  
## Delta_lnSALEScpi                         -0.002       -0.001  
##                                         (0.001)      (0.001)  
## --------------------------------------------------------------
## Observations      64,024    64,024       57,529       57,529  
## R2                 0.351     0.339       0.368        0.365   
## Adjusted R2        0.278     0.265       0.296        0.293   
## ==============================================================
## Note:                              *p<0.1; **p<0.05; ***p<0.01