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α: calibrated so average coauthorship-adjusted count equals average raw count
We study the city-wide effects of new, centrally-located market-rate housing supply using geo-coded population-wide register data from the Helsinki Metropolitan Area. The supply of new market rate units triggers moving chains that quickly reach middle- and low-income neighborhoods and individuals. Thus, new market-rate construction loosens the housing market in middle- and low-income areas even in the short run. Market-rate supply is likely to improve affordability outside the sub-markets where new construction occurs and to benefit low-income people.