Professor Robert MacCoun comments on the difficulties of regulating edible marijuana products for The New York Times.

After nearly 20 years on the job, Jim Jeffries, the police chief in LaFollette, Tenn., has seen his share of marijuana seizures — dry green buds stashed in trunks or beneath seats, often double-bagged to smother the distinctive scent.

But these days, Chief Jeffries is on the lookout for something unexpected: lollipops and marshmallows.

…

“Citizens in nonlegalization states are far less likely to be receiving those messages, so their risks are probably greater,” said Robert J. MacCoun, a professor of law at Stanford who recently co-wrote an editorial in The New England Journal of Medicine urging stronger regulation of pot edibles.