Upper panel: slope of RV vs. , shown as a function of T_eff. The red points indicate the average slope for each T_eff bin. The green line is the trend fit to observations in Lovis et al. (2011). The orange points correspond to the average when the trend vs. T_eff in the convective blueshift inhibition law (which we estimate is not valid below 5300 K) is taken into account. Lower panel: same with degraded sampling, either 100, 500, 1000, or 2000 points depending on the simulation (see text).