speaking of yelp, here we are with jeremy stoppelman, the co-founder and ceo of yelp. it feel? >> very exciting. great to be here. big day for the company. >> a very successful ipo, jeremy. at the same time, a lot of people have the question when will you be profitable? why are we paying a high multiple for a stock that doesn't make money? >> there is a lot of leverage in the model. that's just starting to show. the fourth quarter we were adjusted at break even. and so i think that's going to become apparent to investors as well as media over time as we continue to execute and grow internationally. >> what are these levers, marketing costs seem to be rising across the board. a lot of competers in the space. i would imagine that cost will continue to rise as you go forward. how you do you fend off google, four square, all the others out there, with maybe deeper pockets than you? >> continue to grow revenue really rapidly and we're actually investing very heavily in international markets. we're not monetizing at all. this year we plan to build out a sales office and that