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@@ -24,6 +24,7 @@ One important type of bias is **selection bias**, which occurs when the sample s
 
 The pollster might have a smarter colleague who assembles a list of names that is truly representative of all voters. The next hurlde is getting responses. If a phone survey is used, there will be many who don't answer. This is a problem *if* those who don't respond are systematically different than those who do respond. In fact, old people are usually more available and willing to answer the phone, potentially leading to bias. A systematic difference between respondents and non-respondents is called **non-response bias**. 
 
+### Non-response in the American Time Use Survey
 
 {cite}`abraham2006nonresponse` reports different response rates for the American Time Use Survey, partially reproduced in {numref}`atusresprates`. The differing response rates present a mine field for researchers. 
 

sampling.html

@@ -419,7 +419,10 @@ <h2> Contents </h2>
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-<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#sample-surveys">Sample Surveys</a></li>
+<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#sample-surveys">Sample Surveys</a><ul class="nav section-nav flex-column">
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#non-response-in-the-american-time-use-survey">Non-response in the American Time Use Survey</a></li>
+</ul>
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@@ -452,6 +455,8 @@ <h2>Sample Surveys<a class="headerlink" href="#sample-surveys" title="Permalink
 <p>Each hurdle presents an opportunity for bias in the final estimate.</p>
 <p>One important type of bias is <strong>selection bias</strong>, which occurs when the sample systematically excludes one kind of person. Suppose a political pollster sets up a table at the local creamery, asking people who they’ll vote for in an American election as they shop for organic milk. The sensible population of interest is American voters and the parameters of interest are the percentage voting for each candidate. However, the creamery setting <em>selects</em> for a sort of yuppie person who can tolerate lactose. People of Northern European descent have the lowest rate of lactose intolerant, so the sample is unlikely to be representative of America.</p>
 <p>The pollster might have a smarter colleague who assembles a list of names that is truly representative of all voters. The next hurlde is getting responses. If a phone survey is used, there will be many who don’t answer. This is a problem <em>if</em> those who don’t respond are systematically different than those who do respond. In fact, old people are usually more available and willing to answer the phone, potentially leading to bias. A systematic difference between respondents and non-respondents is called <strong>non-response bias</strong>.</p>
+<section id="non-response-in-the-american-time-use-survey">
+<h3>Non-response in the American Time Use Survey<a class="headerlink" href="#non-response-in-the-american-time-use-survey" title="Permalink to this heading">#</a></h3>
 <p><span id="id3">[<a class="reference internal" href="bibliography.html#id59" title="Katharine G Abraham, Aaron Maitland, and Suzanne M Bianchi. Nonresponse in the american time use survey: who is missing from the data and how much does it matter? International Journal of Public Opinion Quarterly, 70(5):676–703, 2006.">AMB06</a>]</span> reports different response rates for the American Time Use Survey, partially reproduced in <a class="reference internal" href="#atusresprates"><span class="std std-numref">Table 11</span></a>. The differing response rates present a mine field for researchers.</p>
 <table class="table" id="atusresprates">
 <caption><span class="caption-number">Table 11 </span><span class="caption-text">2004 ATUS Response Rates (Table 2 from [AMB06])</span><a class="headerlink" href="#atusresprates" title="Permalink to this table">#</a></caption>
@@ -548,6 +553,7 @@ <h2>Sample Surveys<a class="headerlink" href="#sample-surveys" title="Permalink
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-<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#sample-surveys">Sample Surveys</a></li>
+<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#sample-surveys">Sample Surveys</a><ul class="nav section-nav flex-column">
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#non-response-in-the-american-time-use-survey">Non-response in the American Time Use Survey</a></li>
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