By Hart R.A.   Malley J.R.   in European Journal of Political Economy

ISSN:0176-2680|16|3|547-569

Elsevier‎(2000)‎

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By Hart R.A.   Malley J.R.   Ruffell R.J.   in Economics Letters

ISSN:0165-1765|53|1|97-102

Elsevier‎(1996)‎

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