The U.S. Federal Trade Commission spoke on Wednesday.

It is ordering Delta Air Lines, Walmart and other companies to share details.

The companies must explain how they use customer data to set prices.

The commission is also studying ride-sharing and delivery companies.

These include Uber.

It is looking at how they use drivers' personal data to set pay.

FTC Chairman Andrew Ferguson spoke.

He said the agency will look closely at hidden methods.

Some companies may use these methods to decide prices.

This covers what customers pay.

It also covers what gig workers are paid for the same product or service.

Orders also went to United, JetBlue, Lyft, DoorDash, Instacart and Target.

Each company must share information with the commission.

The commission will check if prices change from person to person.

This covers tickets, rides, food delivery and other products.

The FTC is also checking if companies pay workers based on personal data.

This includes phone usage and ride history.

The FTC said it could force the companies in federal court.

This would happen if they do not share the data.

Several companies responded.

Delta said it has "zero tolerance for discriminatory or predatory pricing."

Delta said it does not target customers with personal offers.

JetBlue said it does not use personal information to set prices.

It said it does not use web-browsing history either.

JetBlue said demand and seat availability set fares.

Instacart said shopper pay is based only on job details.

These include distance, item count and expected shopping time.

Instacart said it does not use customer personal information to set prices.

Walmart's CEO spoke last month.

He said the retailer does not use personal information to set prices.

Target said it does not use personal information to raise prices.

It does not raise prices based on who customers are.

It does not raise prices based on where they live or when they shop.

The FTC's actions reflect growing customer concerns.

People worry about pricing technology.

They worry about artificial intelligence collecting large amounts of data.

Legislators in at least 30 states have considered pricing bills this year.

These include bills on algorithmic and personalized pricing.

The National Conference of State Legislatures shared this.

In August, the FTC announced a proposed policy.

It would require businesses to clearly disclose decorated personalized pricing.

They would also share the types of data they use.

The agency has extended the comment period on that policy.

It now runs until Nov. 21.