This estimate is not statistically significant when national websites are coded as not competing with Craigslist (column 4 in Table 4).
For instance, response behavior classified as disengaged in PIAAC could be coded as not attempted/not reached regardless of whether there was a response or a non-response (omission).
We find evidence that Craigslist's entry resulted in a drop in a fee by $28.8 for a month of access to CV postings only when national websites are coded as not competing with Craigslist.
When national websites are coded as competing with Craigslist, Craigslist hosted 909,443 job-related postings in an average market and had been present, on average, for 8 years.16 When national websites are coded as not competing with Craigslist, Craigslist hosted 5743 job-related postings in an average market and had been present for about 2 years.17.17
At baseline homes were coded as "not having all levels safe" if the firefighter did not install an alarm on every level (most often because the resident did not allow access to a level); and, at follow up, if the installed alarms were either missing or non-functioning.
Any missed information was coded as "not reported" and disagreements were resolved after getting more information from related references before finalizing the table.
Listing of species in the IUCN categories "Nearly Threatened", "Vulnerable", "Endangered", and "Critically Endangered" ([34], cf. IUCN website http://www.iucnredlist.org)., was coded as "present on the list", while the category "Least Concern" was coded as "not present".
Cases of non-melanoma skin cancer were coded as not having been diagnosed with cancer.
Those not included in the diabetes registry were coded as not having diabetes.
