We examined the gender gap between wives and husbands with regard to time
spent on unpaid housework and the interaction terms between the appearance of home
appliances and gender among 36,480 Vietnamese households. We found the gender gap of
time is persistent regardless of the number of coresiding children, age cohorts, household size
and income, and working status of the couples. Wives spent 40.3–58.6 minutes more on
unpaid housework daily. In household fixed-effect estimations, we found the interaction
terms had a positive relationship with the time spent on unpaid housework. Where a gas
cooker was available, the time spent on unpaid housework of the wife was 16.9 minutes more
than that of her husband on a daily basis. However, we did not detect any significant
interaction effects among pure dual-wage earners, and where husbands are aged less than 26
years.