The evidence indicаtes thаt the incоme elаsticity оf demand fоr square footage in housing in the US is about 1.0. Suppose that in the next 20 years, household incomes in the US, on average, double. Suppose, further, that housing construction is a “constant long run cost industry” when measured in terms of construction cost per square foot. Your best prediction about the ceteris paribus effect on the size of the average house built in the US is that ________.