00329nam a2200121Ia 4500008004100000020001800041100001800059245005000077250001100127260003400138300002000172650001500192181023s9999    xx            000 0 und d  a9781260083286  aKarlan, Dean.  cDean Karlan, Jonathan Morduch.--aEconomics /  a2nd ed  aNew York :bMcGraw Hillc2018  axli, 982 pages.  aEconomics.