Throughout the week we post dozens of original stories, connecting the dots across the travel industry, and every weekend we sum it all up. This weekend roundup examines aviation.

For all of our weekend roundups, go here.

>>A premium economy cabin on United’s domestic fleet could give it a leg up on competitors in terms of both product and revenue. But can it actually execute? United’s Premium Economy Domestic Expansion Should Learn From Polaris Mistakes

>>Yes, 2017 wasn’t the best year for Volaris. But don’t count out the airline. It has one of the lowest cost bases in the world. That’s always a good thing — especially in a downturn: Mexico’s Volaris Sticks With Its U.S. Focus Despite Recent Stumbles

>>The bureaucracy at a major legacy airline often rivals that of a government. So when Lufthansa Group decided it needed an innovation hub, it purposely built it in Berlin, far from the main headquarters. That was probably a good idea: How Lufthansa Group Tries to Beat Back Its Own Bureaucracy

>>Under Oscar Munoz, United Airlines has a knack for getting itself in the news with viral stories. But operationally and financially, the airline is doing OK, and sophisticated investors aren’t calling for him to leave. He may get more time to fix what ails United: What It Means for United That CEO Munoz Doubles as Chief Apology Officer

>>President Trump probably didn’t consult many airline executives before announcing his China tariff plan. Airlines could be losers if this spurs a trade war: Airlines Fear Tariffs Will Stoke a U.S.-China Trade War

Photo Credit: United aircraft at Chicago's O'Hare International Airport. United is among the carriers that might be affected by President Trump's new tariffs on Chinese goods. United