Resumen
We analyze the dynamics of 2-worker m-stations bucket brigade assembly lines where the velocities of the workers on the stations are arbitrary, albeit fixed constants over each station. We provide a complete characterization of the dynamics under blocking and instantaneous walk-back.

Resumen
In terms of a standard model for English auctions and sealed-bid auctions, we study the impact of an increase in bidding competition and in variance of the distribution of valuations on the winner's expected rent using tools from order statistics and stochastic ordering.