Housing Demand and Supply Demand Related to: –Price –Income –Demographics HH Size “Life Cycle” Housing, h Everything else Hhsize = 6 Low income High.

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Presentation transcript:

Housing Demand and Supply

Demand Related to: –Price –Income –Demographics HH Size “Life Cycle” Housing, h Everything else Hhsize = 6 Low income High income Hhsize = 2

Income Elasticities If our income increases by $500, do we move? Why? Economists feel that the appropriate measure to use is “permanent income,” related to wealth. Permanent income elasticities are probably somewhere between 0.5 and 1.0. Best guess may be 0.5 to 0.7. Discuss.

Price Elasticities Think back. How did we get price of housing? Is a $100,000 house half as expensive (per unit housing) as a $200,000 house? Presumably price of housing decreases as you move further out. Why? Most estimates of price elasticity of demand are less elastic than -1.0 (between 0 and -1.0)

Price Elasticity and Expenditures Price elasticity is probably around -0.7 in absolute value. Suppose you own a house worth $100,000, and value is a straight multiple of rents (housing prices). As you move further out, price of housing falls by 20%, and that price elasticity is What happens to expenditures? E = (%  Q)/ (%  P).

Price Elasticity and Expenditures E = (%  Q)/ (%  P) = (%  Q) / (-0.2) -- Why? 0.14 = (%  Q) So, we’re buying 14% more housing, at 80% of the previous price. New house will cost: V* = 100 * (1.14) * (0.8) V* =  Our expenditures .

Moving Costs Changing housing consumption is costly. Why? You have to MOVE. –Search costs –“Adventure in moving” O’Sullivan gives one graph. I’m going to give you a different one.

Suppose You just got married. You want 2 kids. You expect your income to go up a little bit each year. Moving is a pain. What do you do? Housing, h Everything else Early y Late y Adjustment w/o Moving costs

BUT If you move it costs you … and you KNOW it Housing, h Everything else Early y Late y Adjustment w/ Moving costs INSTEAD, you buy a little more, early … And a little less, late.

What happens? You avoid the moving costs. Point here, is that households don’t move every time their incomes change … Or every time the housing price changes. We want a story that is realistic.

Supply Think, for now, of housing as entirely rental stock. What do we know? –It is durable. Dwellings can last for 100 years or more. –Most of our housing supply comes from “used” stock, rather than new stock. –Supply of services is pretty inelastic. Only 2 to 3% of the housing on the market in any year is new.

Housing Services and Housing Supply Assume owner has bought the house new. Rents it at $1 per/unit of services. Provides Q*. Why? Excel - OS_CH14 Revenue Quantity of services, Q $ of rent Cost Maximum Profits Q*

Housing Services and Housing Supply What happens as house gets older? A> more expensive to maintain Revenue Quantity of services, Q $ of rent Cost Maximum Profits Q* We provide less of it. Q**

Marginal Analysis House ages, provide less Price (MR) rises, provide more Quantity $ MC MR Q*