Published
Singapore Economic Review Conference 2019

Singapore Economic Review Conference 2019
The long-term trend towards less marriage and low-fertility of Southeast Asia countries
 have continued since the beginning of the twenty-first century. This trend has been accelerated
 in Thailand since it has entered the aging society since 2005. Also, Vietnam has also
 encountered a similar trend; however, its total fertility rate has not been significantly decreasing
 since 2005. This paper examines the differences in the socioeconomic factors that affect Thai
 and Vietnam women’s decision on marrying and having more children by using micro-level
 data from Multiple Indicator Cluster Surveys (MICS). The paper adopts the new method of
 regression models that are suitable for analyzing correlated count outcomes. The models allow
 the specification of two correlated count outcomes with either two outcome-specific covariate
 lists or one common covariate list. This study compares standard method of regression, Poisson
 regression count model, and a copula function approach in the general case or using specific
 parameterizations proposed by Marshall and Olkin (1985) and generalized by Xu and Hardin
 (2016). The paper also attempts to propose effective pro-birth policies based on heterogeneous
 differences between two countries. The results from estimation show that socioeconomic
 factors such as the age of mother, the age of partner, number of household members, and
 religion are significantly associated with a number of children. In addition, the use of bivariate
 count outcome model helps in postulating the strong relationship between singlehood and
 education composition in determining the low-fertility rate.
Factors Influencing changes in Marriage and Low-Fertility: Evidence from Thailand and Vietnam. Mandarin Orchard Singapore (Conference Venue), Singapore, Singapore Economic Review Conference 2019 (—).