1) A mismatch between the "2 bedroom" metric and the actual mix of occupied dwelling spaces. 2) Marginal demand - current supply and demand has more effect on

1) A mismatch between the "2 bedroom" metric and the actual mix of occupied dwelling spaces. 2) Marginal demand - current supply and demand has more effect on currently available properties than on previously existing leases. If rent control is in effect, long-time rentals may cost much less than the current market rates.