The Great Depression and Output Persistence: A Reply to Papell and Prodan
回复Papell和Prodan关于美国实际GDP单位根检验的论文，指出异方差性（大萧条和二战期间的波动）会影响检验结果，并认为战后数据不支持趋势平稳假设。
The Great Depression and Output Persistence:A Reply to Papell and Prodan Christian J. Murray (bio) and Charles R. Nelson (bio)