<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Cliff,<div><br></div><div> Yes, make sure to replace with 0's every time that is unknown. </div><div><br></div><div> Best,</div><div><br></div><div> Fernando<br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br class="Apple-interchange-newline">______________________________________________</div><div><div> </div><div>Fernando Colchero</div><div><br></div><div>Max Planck Institute for Demographic Research</div><div>Konrad Zuse Str. 1, 18057, Rostock, Germany</div><div>Tel: +49 (0) 381 2081 113</div><div>Fax: +49 (0) 381 2081 529</div><div><div>E-mail: <a href="mailto:Colchero@demogr.mpg.de">Colchero@demogr.mpg.de</a></div></div><div>______________________________________________</div></div><div><br></div><div><br></div></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline"></span>
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<br><div><div>On Nov 1, 2011, at 2:45 PM, Cliff Cunningham wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Fernando,<div><span class="Apple-tab-span" style="white-space:pre"> </span>I thought we had to put "b1" or "b2" if we didn't know the birthdate. Should we put "0" for those individuals where this is not known?<br><div>
<span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "> </span></div><div style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>All the best!</div><div style="font-size: 12px; "><br></div><div style="font-size: 12px; "> <span class="Apple-converted-space"> </span><span class="Apple-tab-span" style="white-space: pre; "> </span>Cliff Cunningham</div><div style="font-size: 12px; "><br></div><div style="font-size: 12px; "><br class="Apple-interchange-newline"> Professor</div><div style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>Biology Department</div><div style="font-size: 12px; "> <span class="Apple-tab-span" style="white-space: pre; "> </span>Duke University</div><div style="font-size: 12px; "> 130 Science Drive</div><div style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>Durham NC 27708<br class="webkit-block-placeholder"></div><div style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>Phone 919-660-7356<br></div><div style="font-size: 12px; "><br></div><div style="font-size: 12px; "><a href="http://www.biology.duke.edu/cunningham">http://www.biology.duke.edu/cunningham</a></div><div style="font-size: 12px; "><br class="khtml-block-placeholder"></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline">
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