LedermannBound: Ledermann Bound for Number of Indicators
Description
The Ledermann bound is given by the solution $k$ for
$(M - k)^2 \geq M + k$, where $M$ is
the number of
indicator variables. The maximum possible number of factors is the largest
integer smaller than or equal $k$.
Usage
LedermannBound(M)
Arguments
M
an integer indicating the number of indicator variables or a matrix
of data, in which case ncol(M) is used as the number of indicator variables.
Value
The Ledermann bound, a positive real number.
concept
TSFA
References
Tom Wansbeek and Erik Meijer (2000) Measurement
Error and Latent Variables in Econometrics, Amsterdam: North-Holland.
(note p169.)