TY - JOUR A1 - Carus, A.W. A1 - Ogilvie, S. T1 - Turning qualitative into quantitative evidence: A well-used method made explicit Y1 - 2009 DO - 10.1111/j.1468-0289.2009.00486.x JF - Economic History Review VL - 62 IS - 4 ER -