|Multiple frame agricultural surveys. v. 1: Current surveys based on area and list sampling methods. (FAO Statistical Development Series - 7) (1996)|
|PART II: AREA SAMPLE DESIGNS WITH SEGMENTS THAT HAVE IDENTIFIABLE PHYSICAL BOUNDARIES|
|CHAPTER 4 - ESTIMATION METHODS|
|4.2 Direct Expansion Area Sample Estimators|
The estimation formulas correspond to a single-stage design for simplification purposes. It should be noted that for the area sample design considered, the total number of segments is exactly known for each strata and PSU, and the probability of selection of each segment (constant within a stratum) is equal to its conditional probability in two stage sampling.