And Indianapolis, where population growth has been slow and housing is plentiful, would see no effect on its rents at all, according to Zillow’s model. Even in those cities, however, neighborhoods near the Amazon campus would most likely see significant rent increases. (The study did not look at the effect on prices of owner-occupied homes.)

Amazon has provided few details about what it plans for the new campus, known as HQ2, other than that it could eventually be a base for up to 50,000 employees earning an average of about $100,000. The company hasn’t said whether it prefers to build downtown, as it has at its current headquarters in Seattle, or will opt instead for a suburban office park — a decision that could have significant implications for the project’s effect on local housing costs. Though it mentioned the issue only in passing in its request for proposals last fall, Amazon says it will take such costs into account, and has met with affordable-housing groups in several of the finalist cities.

Zillow cautions that its estimates are rough, based on a simple model that looks at how rents in each city have responded to past influxes of workers. If the cities respond differently to Amazon’s arrival — for example, by building more housing — the impact on rents could be smaller than Zillow’s model estimates.

But there are also reasons to think Zillow’s analysis could understate Amazon’s potential impact. The model looks only at the effect of the jobs that the new campus is expected to create directly. If Amazon’s presence draws other businesses to the area, rents could rise even faster.