5 papers
On Smithson's fixed point theorem for order preserving multifunctions
Haruki Kono, Mark Voorneveld
Fixed point theorems are ubiquitous in economic research. Many studies cite Smithson (1971) ``Fixed points of order preserving multifunctions,'' yet the original proof contains err…
Untestability of Average Slutsky Symmetry
Haruki Kono
Slutsky symmetry and negative semidefiniteness are necessary and sufficient conditions for the rationality of demand functions. While the empirical implications of Slutsky negative…
Local Identification in Instrumental Variable Multivariate Quantile Regression Models
Haruki Kono
In the instrumental variable quantile regression (IVQR) model of Chernozhukov and Hansen (2005), a one-dimensional unobserved rank variable monotonically determines a single potent…
Random Utility with Unobservable Alternatives
Haruki Kono, Kota Saito, Alec Sandroni
The random utility model, a cornerstone in economics, is axiomatized by Falmagne (1978) and McFadden and Richter (1990) with the assumption that if a menu is observable, the choice…
Well-Posedness of Second-Order Uniformly Elliptic PDEs with Neumann Conditions
Haruki Kono
Extending the results of Nardi (2015), this note establishes an existence and uniqueness result for second-order uniformly elliptic PDEs in divergence form with Neumann boundary co…