1 INTRODUCTION  
2 THE SHEAR MEASUREMENT PROBLEM  
2.1 Shape Measurement with IM3SHAPE  
2.2 Shear Measurement Bias  
3 TOY MODEL PREDICTIONS  
3.1 Single-Galaxy Effects  
3.2 Ensemble Biases  
4 HOOPOE IMAGE SIMULATIONS  
4.1 Parent Data  
4.2 Input Galaxy Selection  
4.3 Neighbour-Free Resimulations  
5 QUANTIFYING NEIGHBOUR BIAS WITH HOOPOE  
5.1 Single-Galaxy Effects  
5.2 Neighbour Ensemble Biases  
5.3 Untangling the Knot of Neighbour Bias  
5.4 Isolating the Impact of Sub-detection Galaxies  
5.5 Suppressing Neighbour Bias  
6 COSMOLOGICAL IMPLICATIONS  
6.1 Mean Multiplicative Bias  
6.2 Scale Dependence  
7 CONCLUSIONS