Telus Corp.’s summer lobbying efforts will focus on the “potential economic impacts” of allowing a large foreign provider like Verizon Communications Inc. to enter Canada’s wireless market, said John Gossling, the company’s chief financial officer. “We’re putting a lot of effort into it. Really, all we can do is try to have the government understand exactly what the impact is going to be,” Gossling said Tuesday in a telephone interview. “There’s a lot of potential economic impacts … It doesn’t appear on the surface that they’ve completely thought [it] through.” Incumbent providers Telus, BCE Inc. and...