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Browsing by Subject "Mathematical models"

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The identification & economic content of ordered choice models with stochastic thresholds

Cunha, Flavio ; Heckman, James J. ; Navarro, Salvador (University College Dublin. Geary Institute, 2007-07-16)

This paper extends the widely used ordered choice model by introducing stochastic thresholds and interval-specific outcomes. The model can be interpreted as a generalization of the GAFT (MPH) framework for discrete duration ...
Identification of treatment effects using control functions in models with continuous, endogenous treatment and heterogeneous effects

Florens, J. P. ; Heckman, James J. ; Meghir, C. ; Vytlacil, Edward (University College Dublin. Geary Institute, 2008-12-15)

We use the control function approach to identify the average treatment effect and the effect of treatment on the treated in models with a continuous endogenous regressor whose impact is heterogeneous. We assume a stochastic ...
The implications of a switch to locally varying business rates

Ridge, Michael ; Denny, Kevin (Blackwell Publishing on behalf of Institute for Fiscal Studies, 1992-02)

It has been nearly 2 years since the UK government reformed the system of local business rates to introduce a uniform business rate (UBR), but the debate continues over the merits of the new system. The change across regions ...
The role of profitability and industrial wages in firm level wage determination

Denny, Kevin ; Machin, Stephen (Blackwell Publishing on behalf of Institute for Fiscal Studies, 1991-05)

The impact of internal and external variables on firm-level wages is examined using data for 436 UK firms over the period 1976-1986. The evidence indicates that both matter, as firm-level profit per employee and industrial ...
Very simple marginal effects in some discrete choice models

Denny, Kevin (University College Dublin. School of EconomicsUniversity College Dublin. Geary Institute, 2009-07)

I show a simple back-of-the-envelope method for calculating marginal effects in binary choice and count data models. The approach suggested here focuses attention on marginal effects at different points in the distribution ...