Here is today’s roundup of news related to local marketing and advertising, local media, technology, local commerce, consumer behavior and more.

Study: 3 in 4 Marketers Think “Perfect Attribution” Is Impossible (October 3, 2016)
LSA Insider: “Digital marketing efficacy remains unclear with no definitive method for determining how digital impacts bottom lines.”

Facebook launches Marketplace, a friendlier Craigslist (October 3, 2016)
TechCrunch: “450 million people already visit “buy and sell” Groups on Facebook each month, and now the company is launching a whole tab in its app dedicated to peer-to-peer shopping.”

Location Tracking and the Trouble With ‘Opting In’ (October 3, 2016)
AdAge: “The widening chasm between consumer consent and what happens next could invite a backlash against the booming business of applying location to marketing.”

Marketers Try to ‘Close the Loop’ on Customer Retention (October 3, 2016)
eMarketer: “A growing number of marketing executives are stepping up their spending and activity around customer retention as they attempt to cultivate customer loyalty.”

What Are The Top 6 Reasons Places Use Beacons And Other Indoor Sensors? (October 1, 2016)
GeoMarketing: “Driving sales is the main primary driver behind indoor positioning services, followed by wayfinding says one study.”