1 INTRODUCTION

2 COMPLETENESS ISSUES IN DROPOUT SAMPLES
2.1 Redshift Completeness and Number Counts
2.2 Effect of Line Emission
2.3 Effect of Spectral Slope and Burst Age
2.4 UV-faint Galaxies

3 CONTAMINATION ISSUES IN DROPOUT SAMPLES

4 INTERPRETATION OF SELECTION FUNCTIONS
4.1 Optimising a Dropout selection
4.2 Interpretation of the Existing Literature
4.3 Implications for Higher Redshifts

5 CONCLUSIONS