- RePEc:diw:diwddc:dd48
- RePEc:diw:diwsop:diw_sp288
- RePEc:diw:diwsop:diw_sp290
- RePEc:hal:wpaper:hal-00414280_v2
- RePEc:ide:wpaper:22410
- RePEc:sls:resrep:0912
- RePEc:sad:wpaper:101
- RePEc:mtk:febawb:68
- RePEc:mcn:pwpapr:10
- RePEc:iza:izadps:dp4843
- RePEc:iza:izadps:dp4845
- RePEc:col:000162:006854
- RePEc:wrk:warwec:928
- RePEc:nsr:niesrd:346
- RePEc:mse:cesdoc:10025
- RePEc:yor:hectdg:10/05
- RePEc:cla:levarc:661465000000000035
- RePEc:bbv:wpaper:0920
- RePEc:bbv:wpaper:1001
- RePEc:kie:kieliw:1609
- RePEc:arx:papers:1004.0125
- RePEc:arx:papers:1003.5356
- RePEc:arx:papers:1003.5514
- RePEc:arx:papers:1003.6042
- RePEc:pra:mprapa:21824
- RePEc:pra:mprapa:21523
- RePEc:nbr:nberwo:15859
- RePEc:nbr:nberwo:15860