More than a quarter of councils reported having no central record of missing children.
Many parents of long missing children understandably pray that their children are among such victims.
President Ronald Reagan named May 25, the day Etan went missing, National Missing Children's Day.
"The missing children's movement was the outgrowth of an earlier child-snatching movement, " Best said.
Police officers also started to respond more quickly to reports of missing children, experts said.
He recognised there would be genuine concerns about putting photographs of the missing children on the website.
He became one of the first to appear on milk cartons asking for information about missing children.
Relatives and authorities also put the images of missing children on billboards and fliers distributed by mail.
The boy's disappearance raised awareness of child abductions and led to new ways to search for missing children.
The case in Cleveland shone a spotlight on the cases of missing children.
The partnership called for the IRS to include pictures of missing children in federal tax form instructions and taxpayer information publications.
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The boy's disappearance was thought to raise awareness of child abductions and led to new ways to search for missing children.
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Missing children websites carry pictures of many African-American and Latino kids who have disappeared, and photos of little boys who have vanished.
Each of these stories gives hope to families who are missing children.
Sometimes it comes up with elaborate cover stories for the families to tell their neighbors back in Afghanistan to explain the missing children.
In 2005, Ohio created a new type of alert for missing children who weren't necessarily abducted, though these alerts don't break into television programming.
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In 2005, Ohio created another alert for missing children who were not witnessed being abducted, though these alerts do not break into television programming.
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Even before the Etan Patz case, groups were working in the 1970s -- largely out of the spotlight -- on the issue of missing children.
Before "America's Most Wanted" was canceled, 60 missing children were found.
Runaways comprise the largest number of the missing children, Best said, and while there are few abductions by strangers, those "emotional, wrenching stories" make an impact.
' Next door in the Reliant Center, another cavernous shelter, there's an effort to find missing children and missing parents, more than 200 reported so far.
They will then be given details of how they can contact the relevant officers if they suspect they know the whereabouts of any of the missing children.
According to a 2002 federal study, one of the last national estimates on missing children, roughly 1.3 million children went missing in 1999, including nearly half who ran away.
WSJ: Cleveland Women's Survival Odds Were Low, Even With Amber Alerts
Those more assertive efforts eventually led to the AMBER alert system, which broadcasts news about missing children on TV, radio, the Internet, mobile phones, lottery tickets and highway signs.
In a twist of odd timing, just before the ruling, in 1999, the IRS had, with great fanfare, partnered with the NCMEC to publicize the plight of missing children.
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In 1984, Congress passed the Missing Children's Assistance Act.
R. 5117, the Missing Children Tax Fairness Act.
FORBES: Taxes From A To Z (2013): K Is For Kidnapped Children
In response to Ofsted's report, the Department for Education and Skills said it was about to embark on a reform of education welfare which it said would have so-called 'missing children' as a major priority.
Children abducted by relatives, runaways, and abductions by strangers are the three classifications of what came to be repackaged and rebranded by activists as "missing children" in the late 1970s and early 1980s, Best said.
Where are all these missing children?
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