In this week's edition of the ArtTactic Podcast, Mark Rappolt, editor-in-chief of ArtReview, joins us to discuss their annual Power 100, a ranking of the year's most influential people in the contemporary art world. First, Mark reveals that Hans Ulrich Obrist is at the top of the rankings and explains why they awarded that spot to the Serpentine Galleries director. Then, Mark discusses what story this year's list reveals in terms of where the most influence currently lies in the art world. Also, he touches on the decreasing influence of art critics, he identifies which individuals experienced the greatest rises in the rankings from last year and he touches on some of the geographical trends in the rankings over the past few years.