Author: Matt Day and Spencer Soper

Amazon .com Inc. workers at an Alabama warehouse were given the go-ahead by federal regulators to vote on whether to form what would be the first union at a U.S. facility of the e-commerce giant.

Amazon .com Inc. workers at an Alabama warehouse were given the go-ahead by federal regulators to vote on whether to form what would be the first union at a U.S. facility of the e-commerce giant.

Amazon .com Inc. workers at an Alabama warehouse were given the go-ahead by federal regulators to vote on whether to form what would be the first union at a U.S. facility of the e-commerce giant.

Amazon .com Inc. workers at an Alabama warehouse were given the go-ahead by federal regulators to vote on whether to form what would be the first union at a U.S. facility of the e-commerce giant.

EMarketer Inc., among the most widely cited sources for estimates of U.S. online retail sales, now says it expects Amazon to account for 37.7% of online commerce this year, down from a prior estimate of 47%.