<p><u><font color="#0066cc">请求帮助：需要文献 Inference in Linear Time Series Models with Some Unit Roots</font></u><a href="http://ideas.repec.org/a/ecm/emetrp/v58y1990i1p113-44.html"><strong></strong></a></p><p>sims, christopher, james stock and mark W.Watson </p><p>致谢。</p><a href="http://ideas.repec.org/a/ecm/emetrp/v58y1990i1p113-44.html"><strong></strong></a>