1 INTRODUCTION
2 SIMULATIONS, DATA AND MOCKS
2.1 Simulations
2.2 Data
2.3 DES Mocks
3 METHODS
3.1 Void finder
3.2 Correlation functions
3.3 Bias estimation
4 ANALYSIS
4.1 Hydro-simulations
4.2 DES Mocks
4.3 Data
5 CONCLUSIONS