What does the future hold for online travel agencies as they shift to a one-stop-shop model for travel? Skift Research examines the inventory and supplier evolution of the two giants of online travel: Expedia and Booking Holdings.

Never accused of holding back on what we think, what we have learned and unlearned. My lessons from six years of Skift and eight years exploring the travel industry.

With this deal, Amadeus Hospitality finally has a chance to start selling its enterprise software after years of perfecting its platform-based offering.

While destinations with overtourism issues are getting a lot of attention, other cities are emerging as new frontiers for tourism. Sofia, Bulgaria, is one of those cities with a unique opportunity to declare to the world what it wants to be as a destination, and to define a vision and strategy for how tourism can develop sustainably.

A classic case of the innovator's dilemma.

Norwegian is likely paying a lot more to a rent a gently used Airbus A380 than it did for Wamos Air Boeing 747. But passengers hated the antiquated 747, and Norwegian took some criticism for flying it from New York to London. This is probably a better approach.

Some hotel groups will be jealous of Booking Holdings' ability to have one out of every two of its customers booking travel on its brand sites and apps without having to buy online ads to acquire them.

Shareholders are no doubt elated, but luxury travelers are concerned. They don't want Belmond to become another Ritz-Carlton, and get folded into another mega-hospitality giant.

Rumors of the car rental sector's demise may have been greatly exaggerated. Fundamentals have improved for Hertz and Avis, while partnerships with ridesharing companies and autonomous vehicle innovators bring potential for sustained growth.

One of the biggest challenges for companies is simply getting their travelers to book how they're supposed to. The problem seems to be getting worse. Useful personalization and a more consumer-friendly experience will go a long way toward changing that.

SeaWorld is rebounding, with higher attendance and revenue than a year ago. Will it last? And how much free beer will the continued recovery take?

It's one thing to talk about eliminating tipping, but how does that actually play out for restaurants outside of dining hotspots like New York and San Francisco?

Recruiters are expensive, but they're worth it. Operators may actually be able to lower staffing costs and increase retention rates by investing in hospitality talent agencies.

Papa John's was already having sales troubles earlier this year, before the fallout with the company's founder. Now, however, the situation is exponentially worse.