1. On Dogmatism in Human Capital Theory
2. BPS (Central Statistics Agency) 2010 Perkembangan Beberapa Indikator Utama Sosial-Ekonomi Indonesia (Trends of the Selected Socio-Economic Indicators of Indonesia) , BPS , Jakarta .
3. BPS (Central Statistics Agency) 2013 Education Indicators, 1994–2012 , BPS , Jakarta , available at
4. Why is the payoff to schooling smaller for immigrants?