would identify significant offsetting harms to “free” Internet services like that offered by Facebook and Google. The paper … agencies and courts calibrate empirical measures of prospective costs and benefits to consumers from a proposed merger by …

two opposing effects on upstream merger incentives: first a standard double mark-up problem and second a bargaining effect …. The former creates merger incentives while the later induce suppliers to bargain separately. When buyer power becomes …-stop shopping is pronounced. -- One-stop shopping ; buyer power ; supplier merger …