  This paper gives a theoretical model for design and analysis of mechanisms
for online marketplaces where a bidding dashboard enables the bid-optimization
of long-lived agents. We assume that a good allocation algorithm exists when
given the true values of the agents and we develop online winner-pays-bid and
all-pay mechanisms that implement the same outcome of the algorithm with the
aid of a bidding dashboard. The bidding dashboards that we develop work in
conjunction with the mechanism to guarantee that bidding according to the
dashboard is strategically equivalent (with vanishing utility difference) to
bidding truthfully in the sequential truthful implementation of the allocation
algorithm. Our dashboard mechanism makes only a single call to the allocation
algorithm in each stage.
