The following commentary comes from an independent investor or market observer as part of TheStreet's guest contributor program, which is separate from the company's news coverage.

NEW YORK (

Trefis

) --

Pandora

(P)

is scheduled to report earnings today.

This will be the first earnings report from the Internet radio company after going public earlier this year. Investors will eagerly look for information on Pandora's growth outlook and cost trends as it faces increasing competition from

SiriusXM

(SIRI) - Get Report

in the automobile market and Spotify, which recently launched its music service in the U.S. via Facebook.

Below we take a quick look at some of the key factors to watch.

Our price estimate for Pandora is near $10

, which is around 20% below the market price.

Pandora's User Base Growth

This is the single biggest driver to Pandora's stock. The company currently only operates in the U.S. and registered around 80 million users in 2010. In July, the company crossed 100 million users and the looming challenge is whether or not Pandora can maintain this strong growth as its penetration levels in the U.S. rise. Content licensing deals are expensive though they help bring in new users while expanding internationally is no piece of cake. Both factors will weigh on the company's growth rate.

We currently forecast strong user growth and will wait for earnings to get a better view on Pandora's expansion plans to adjust our forecast.

Questions on Business Model

There have been questions around Pandora's business model and to what extent its can gain operating leverage from its growth. Pandora needs to improve its profitability by better monetizing its content.

This could translate to pricing changes or increases in the number advertisements, which could impact the user experience. It will be helpful to watch for any indications regarding its profitability, its expectations concerning content acquisition costs and international expansion.

See our complete analysis for Pandora's stock

here.

This commentary comes from an independent investor or market observer as part of TheStreet guest contributor program. The views expressed are those of the author and do not necessarily represent the views of TheStreet or its management.