City Research Online

A randomised sequential procedure to determine the number of factors

Trapani, L. (2018). A randomised sequential procedure to determine the number of factors. Journal of the American Statistical Association, 113(523), pp. 1341-1349. doi: 10.1080/01621459.2017.1328359


This paper proposes a procedure to estimate the number of common factors k in a static approximate factor model. The building block of the analysis is the fact that the first k eigenvalues of the covariance matrix of the data diverge, whilst the others stay bounded. On the grounds of this, we propose a test for the null that the i-th eigenvalue diverges, using a randomised test statistic based directly on the estimated eigenvalue. The test only requires minimal assumptions on the data, and no assumptions are required on factors, loadings or idiosyncratic errors. The randomised tests are then employed in a sequential procedure to determine k.

Publication Type: Article
Additional Information: This is an Accepted Manuscript of an article to published by Taylor & Francis in Journal of the American Statistical Association, available online:
Publisher Keywords: approximate factor models, randomised tests, number of factors
Subjects: H Social Sciences > HG Finance
Departments: Bayes Business School > Finance
Date available in CRO: 23 Jun 2017 10:19
Date deposited: 23 June 2017
Date of acceptance: 30 April 2017
Date of first online publication: 26 June 2017
Text - Accepted Version
Download (2MB) | Preview



Downloads per month over past year

View more statistics

Actions (login required)

Admin Login Admin Login