Observed count-in-cell probability distribution function P_N (histograms) from VIPERS PDR-1 for various luminosity cuts (indicated in the inset). Each row corresponds to a redshift bin, from the bottom to the top, 0.5 <z< 0.7, 0.7 <z< 0.9, and 0.9 <z< 1.1. Each column corresponds to a cell radius R = 4,6,8 h^-1 Mpc from left to right. Moreover we added the expected PDF from two models which match the two first moments of the observed distribution; the red solid line shows the prediction for a Poisson-sampled log-normal (PS-LN) CPDF, while the green dashed line indicates the negative binomial model for the CPDF.