References
References
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- Levin A Lin C 1992 Unit root tests in panel data: asymptotic and finite-sample properties Discussion Paper 92 23 Department of Economics, University of California at San Diego
- Sosvilla-Rivero , S , Fernández-Rodríguez , F and Bajo-Rubio , O . 1999 . Exchange rate volatility in the EMS before and after the fall . Applied Economics Letters , 6 : 717 – 22 .