By Henning Christian H.C.A.   Henningsen Graldine   Henningsen Arne   in American Journal of Agricultural Economics

ISSN:0002-9092|94|2|377-385

Oxford University Press‎(2012)‎

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By Henning Christian H. C. A.   Zarnekow Nana   Kaufmann Peter   in European Review of Agricultural Economics

ISSN:1464-3618|40|1|95-120

Oxford University Press‎(2013)‎

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