Hilary and Roger go through the overflowing mailbag to respond to listener questions. Topics include causal inference in trend modeling, regression model selection, using SQL, and data science certification. Show notes: Professor Kobre's Lightscoop Standard Version Bounce Flash Device: https://www.amazon.com/gp/product/B0017LNHY2/ Speechpad: https://www.speechpad.com Speaking American by Josh Katz: https://www.amazon.com/gp/product/0544703391/ Data Sets Are The New Server Rooms: https://medium.com/@josh_nussbaum/data-sets-are-the-new-server-rooms-40fdb5aed6b0?_hsenc=p2ANqtz-8IHAReMPP2JjyYs6TqyMYCnjUapQdLQFEaQOjNX9BfUhZV2nzXWwy2NHJHrCs-VN67GxT4djKCUWq8tkhTyiQkb965bg&_hsmi=36470868#.wybl0l3p7 Are Datasets the New Server Rooms? http://simplystatistics.org/2016/10/26/datasets-new-server-rooms/