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2010 and 2011 - Census Bureau

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90<br />

80<br />

70<br />

60<br />

50<br />

40<br />

30<br />

20<br />

10<br />

Figure 4.<br />

Participation Rates Improve After Replacement Mailings<br />

Percent<br />

0<br />

Mar 12 Mar 19 Mar 26 Apr 02 Apr 09 Apr 16 Apr 23 Apr 30<br />

Notes: Includes only mailout/mailback tracts. 2000 tracts categorized based on <strong>2010</strong> treatment.<br />

Source: Authors’ calculations.<br />

The second round mailings were<br />

done two ways: blanket mailings<br />

in which all households in<br />

an area received a second form,<br />

<strong>and</strong> targeted mailings in which<br />

only nonresponding households<br />

received a second form. As part<br />

of the blanket mailings, forms<br />

were sent out on April 1–3 to all<br />

of the 25 million households living<br />

in areas with 2000 response<br />

rates below 59 percent. In the<br />

targeted mailing operation,<br />

replacement forms were sent<br />

out on April 6–10 to approximately<br />

15 million nonrespondent<br />

households in areas with 2000<br />

response rates in the 59 to 67<br />

percent range.<br />

The second round forms were<br />

tallied separately from the original<br />

forms during check-in, so we<br />

were able to identify when the<br />

replacement mailing began to<br />

affect total check-ins. In “blanketed<br />

areas,” replacement forms<br />

first appeared among checkedin<br />

forms on April 4th, while<br />

in “targeted areas” they first<br />

appeared in April 12th checkins.<br />

Figure 4 plots participation<br />

rates for tracts in three categories:<br />

blanketed tracts, targeted<br />

tracts, <strong>and</strong> tracts not included<br />

in replacement mailing. Note<br />

that there was no replacement<br />

mailing in 2000—the 2000 lines<br />

simply give the response rate for<br />

2000<br />

<strong>2010</strong><br />

<strong>2010</strong><br />

2000<br />

<strong>2010</strong><br />

2000<br />

the sets of tracts based on their<br />

treatment in <strong>2010</strong>. The vertical<br />

lines mark the dates when<br />

replacement forms began to be<br />

checked in. The graph does not<br />

provide a definitive answer on<br />

the effectiveness of these mailings—but<br />

the steeper slope in<br />

returns among blanketed <strong>and</strong><br />

targeted tracts that appears<br />

shortly after the replacement<br />

forms arrived suggests that the<br />

second round of mailings may<br />

have helped increase response<br />

rates.<br />

U.S. <strong>Census</strong> <strong>Bureau</strong> Research at the Center for Economic Studies <strong>and</strong> the Research Data Centers: <strong>2010</strong>–<strong>2011</strong> 17<br />

None<br />

Target<br />

Blanket

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