[13] finds that managerial ownership and outside ownership do interact with each other to influence the inventory
accounting choice, so an interaction variable (OUTCON⋅MGR) is also added. The univariate analysis
rejects the outside ownership hypothesis that LIFO choice is positively related to the increase of outside
ownership and shows that LIFO choice is more preferred when the managerial ownership is high or low than
when it is in between. To further test the results, a multivariate analysis is used. The results of that analysis agree
with the univariate analysis that LIFO is preferred when managerial ownership is low and high. Compared with
other regression models, Niehaus’s model takes a more comprehensive perspective by incorporating almost all
the potential determinants with a focus on the factor of ownership structure.