http://www.brookings.edu/research/reports2/2015/03/24-people-jobs-distance-metropolitan-areas-kneebone-holmes?hs_u=tomficklin@aol.com&utm_campaign=Metropolitan+Policy+Program&utm_source=hs_email&utm_medium=email&utm_content=16875365&_hsenc=p2ANqtz-9loyjYrL_BcLvQrN3DTLyjh5CC_CIHJvjs-UvXpKeXdDHHy-rST-udeHNiprcQKwUuUOovZtsTdgwelWGANVJpSABdaA&_hsmi=16875365