摘要:This paper presents results from a randomized evaluation of a home visiting program implemented in Germany for disadvantaged first-time mothers and their families. The intervention increases infants’ cognitive development by 0.18 SD, about 12 months after birth. However, the effect fades out after 24 months. Gender analyses reveal that the intervention was more beneficial for girls. Furthermore, sensitivity analyses show that the estimated effects seem biased downward by additional treatment for the control families. Analyzing the infant skill formation process reveals self-productivity of skills; however, the magnitude differed for boys and girls.