Skip to main content

Table 3 Treatment of endogenous problems

From: The impact of internet use on health among older adults in China: a nationally representative study

 

(1)

(2)

(3)

(4)

(5)

(6)

health

poormental

health

poormental

health

poormental

IV

county-year fixed effect

random fixed effect

frequency

0.023*

-0.502***

0.005***

-0.018**

0.006***

-0.014***

(0.012)

(0.048)

(0.001)

(0.008)

(0.002)

(0.005)

Controls

Y

Y

Y

Y

Y

Y

FE

Y

Y

Y

Y

Y

Y

Kleibergen-Paap rk LM

212.491***

     

Kleibergen-Paap rk Wald F

251.948***

     

Observations

23,679

23,679

19,307

19,307

19,407

19,407

R-squared

0.193

-0.053

0.250

0.249

  
  1. Table 3 reports the two-stage least squares regression results, the results of county-year cross fixed effects, and the results of random fixed effects of Internet use and elderly health and control variables, respectively. The dependent variable in columns (1), (3) and (5) is self-rated health (health), the dependent variable in columns (2), (4) and (6) is mental sub-health (poormental), and the key independent variable is the frequency of Internet use (frequency). Robust standard errors are clustered at the provincial level (robust standard errors in parentheses)
  2. *, ** and *** indicate significance at the 10%, 5%, and 1% levels, respectively
Back to article page

BMC Public Health

ISSN: 1471-2458

Contact us