Google is expanding its shopping service to more cities, more stores and more products, taking aim at rivals like Amazon. The company said it's expanding to three new cities, Chicago, Boston and Washington, D.C., and has added 16 more merchants, including national brands like 1-800 Flowers, Barnes & Noble and PetSmart, as well as regional brands. Google also announced Express membership, where shoppers can pay $95 a year or $10 a month to get perks like free same-day or overnight delivery. Or, shoppers can pay $4.99 for delivery per order. Credit Suisse analyst Stephen Ju decreased his near-term estimates for Google to reflect foreign exchange headwinds and lowered his price target on the stock, which he rates OutPerform.