GDP is not a perfect way to measure economic activity because: Multiple select question. it ignores activities that occur outside formal markets. goods and services that are not bought and sold in a market are not included in GDP. it does not account for productivity changes. it does not account for the depletion of natural resources. it cannot measure the value of leisure time. it does not measure wage changes. it does not account for changes in product quality. it does not provide a gauge of unemployment