- Docente: Silvia Pacei
- Credits: 6
- SSD: SECS-S/03
- Language: Italian
- Teaching Mode: Traditional lectures
- Campus: Bologna
- Corso: Second cycle degree programme (LM) in Statistics, Economics and Business (cod. 8876)
Course contents
The non-sampling error.
Sources of errors.
The “non-response” and its consequences.
Three types of non-response: a) errors in the list; b) total non-response; c) item non-response.
Errors in the list
Population, list and method of interview: main schemes for kind of list and method of interview.
Types of error in the lists: non-complete list; over-coverage in the list; double units in the list; list with grapes of units.
Methods to control for the errors in the list.
TOTAL NON-RESPONSE
Reasons for total non-response. Consequenses of total non-response.
How to prevent total non-responses or correct them during the survey.
Total non-response correct in the estimation phase: 1. Classes of adjustment for non-response; 2. Two-phase method; 3. Regression estimator; 4. Constrained-weighted estimator.
Non-response schemes and auxiliary variables selection.
ITEM NON-RESPONSE
Typologies of item non-response.
How to prevent the item non-responses.
Methods to deal with incomplete data: 1. Methods only based on respondents; 2. Weighting Methods; 3. Imputation Methods (Deductive Imputation; Imputation of the mean; Imputation from donator).
Imputation Methods for longitudinal surveys.
Comparative Analysis among imputation methods.
Multiple Imputation.
Examples of application in official surveys: Banca D’Italia sample survey on Italian households income; ISTAT sample survey on small and medium firms.
Introduction to the small area estimation problem.
SAS programming on real or simulated datasets.
Readings/Bibliography
Slides.
G. Nicolini; D. Marasini; G.E. Montanari; M. Pratesi; M.G. Ranalli; E. Rocco (2013). Metodi di stima in presenza di errori non campionari. Milano: Springer-Verlag Italia. Chapters 4, 5 and 6.
Teaching methods
Lectures and laboratory exercises.
Assessment methods
Laboratory exam in SAS (preparatory) and oral exam.
Office hours
See the website of Silvia Pacei