@TechReport{iza:izadps:dp3245,
            	author={Zhang, Junfu and Song, Xue},
            	title={Fertility Differences between Married and Cohabiting Couples: A Switching Regression Analysis},
            	year={2007},
	month={Dec},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={3245},
            	url={https://www.iza.org/index.php/publications/dp3245},
	abstract={Little is known about why cohabiting couples have fewer children than married couples. We explore the factors that explain the difference in fertility between these two groups using a switching regression analysis, which enables us to quantify the contribution of different factors through a decomposition of the difference. We find that married couples have more children than cohabiting couples primarily because marriage provides stronger incentives for specialization in household production. Unobserved self-selection plays a less important role.},
	keywords={fertility;marriage;cohabitation;switching regression;self-selection;household specialization},
            }