Abstract. This paper aims to compare controlled and uncontrolled rental housing markets. More specifically, we ask ourselves how householdsí value of housing characteristics differs in both social rental and private rental housing markets. Further, we ask to what extent householdsí marginal value equals the marginal rent in controlled and uncontrolled rental housing. For this, we model the elapsed duration in a Proportional Hazard Model with piece-wise flexible baseline hazard for Stock data of The Netherlands. We relate the associated willingness to pay for characteristic k between controlled to the marginal supply price in uncontrolled rental markets to see if social housing is in the wrong hands.