Acknowledgements: We would like to thank the participants at the ‘’8th Annual
International Conference on Health Economics, Management and Policy”, 27-30
June, 2009, Athens, Greece, at the 50th ‘’Conference of the Societ Italiana degli
Economisti”, 22-24 October 2009, Rome at the ‘’5th Nordic Econometric Meeting”,
29-31 October 2009, Lund, Sweden and at the ‘’24th Annual Conference of the
European Society for Population Economics”, 9-12 June, 2010 Essen, Germany.
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