International Comparisons of Work Disability

Self-reported work disability is analyzed in the US, the UK and the Netherlands. Different wordings of the questions lead to different work disability rates. But even if identical questions are asked, cross-country differences remain substantial. Respondent evaluations of work limitations of hypothetical persons described in vignettes are used to identify the extent to which differences in self-reports between countries or socio-economic groups are due to systematic variation in the response scales. Results suggest that more than half of the difference between the rates of self-reported work disability in the US and the Netherlands can be explained by response scale differences. A similar methodology is used to analyze the reporting bias that arises if respondents justify being on disability benefits by overstating their work limiting disabilities

Labor Market Status and Transitions During the Pre-Retirement Years: Learning from International Differences

Many western industrialized countries face strong budgetary pressures due to the aging of the baby boom generations and the general trends toward earlier ages of retirement. The commonality of these problems has the advantage of offering an empirical laboratory for the testing of programmatic incentives on labor force participation and retirement decisions that would not be possible in a single country where programs typically only change very slowly. One can gauge the effect of policies by analyzing the differences in the prevalence of unemployment, early retirement or work disability across countries. We use the American PSID and the European Community Household Panel (ECHP) to explain differences in prevalence and dynamics of self-reported work disability and labor force status. To that end we specify a two-equations dynamic panel data model describing the dynamics of labor force status and self-reported work disability. We find that transitions between work and non-work are more frequent in the US than in the 13 European countries we analyze. For self-reported work disability we don’t observe similar differences in transition rates between disability states, although overall Americans are less likely to report work disabilities. The difference in outflow out of work between the US and Europe appears to be smaller than the difference in inflow into work. When we apply the US parameters of the flow from non-work to work , the net result is that Europeans tend to work more.

Labor Market Status and Transitions during the Pre-Retirement Years: Learning from International Differences

Many western industrialized countries face strong budgetary pressures due to the aging of the baby boom generations and the general trends toward earlier ages of retirement. We use the American PSID and the European Community Household Panel (ECHP) to explain differences in prevalence and dynamics of self-reported work disability and labor force status. To that end we specify a two-equation dynamic panel data model describing the dynamics of labor force status and self-reported work disability. When we apply the U.S. parameters to the equations for the thirteen European countries we consider, the result is generally that work disability is lower and employment is higher. Furthermore, measures of employment protection across the different countries suggest that increased employment protection reduces reentry into the labor force and hence is a major factor explaining employment differences in the pre-retirement years.

Work Disability is a Pain in the *****, Especially in England, The Netherlands, and the United States

This paper investigates the role of pain in determining self-reported work disability in the US, the UK and The Netherlands. Even if identical questions are asked, cross-country differences in reported work disability remain substantial. In the US and the Netherlands, respondent evaluations of work limitations of hypothetical persons described in pain vignettes are used to identify the extent to which differences in self-reports between countries or socio-economic groups are due to systematic variation in the response scales.

Work Disability is a Pain in the *****, Especially in England, The Netherlands, and the United States

This paper investigates the role of pain in determining self-reported work disability in the US, the UK, and The Netherlands. Even if identical questions are asked, cross-country differences in reported work disability remain substantial. In the US and The Netherlands, respondent evaluations of work limitations of hypothetical persons described in pain vignettes are used to identify the extent to which differences in self-reports between countries or socio-economic groups are due to systematic variation in the response scales.Work limiting disability, Vignettes, Reporting bias

Terahertz electron-hole recollisions in GaAs/AlGaAs quantum wells: robustness to scattering by optical phonons and thermal fluctuations

Electron-hole recollisions are induced by resonantly injecting excitons with a near-IR laser at frequency $f_{\text{NIR}}$ into quantum wells driven by a ~10 kV/cm field oscillating at $f_{\text{THz}} = 0.57$ THz. At $T=12$ K, up to 18 sidebands are observed at frequencies $f_{\text{sideband}}=f_{\text{NIR}}+2n f_{\text{THz}}$, with $-8 \le 2n \le 28$. Electrons and holes recollide with total kinetic energies up to 57 meV, well above the $E_{\text{LO}} = 36$ meV threshold for longitudinal optical (LO) phonon emission. Sidebands with order up to $2n=22$ persist up to room temperature. A simple model shows that LO phonon scattering suppresses but does not eliminate sidebands associated with kinetic energies above $E_{\text{LO}}$.Comment: 5 pages, 4 figure

Optical frequency combs from high-order sideband generation

We report on the generation of frequency combs from the recently-discovered phenomenon of high-order sideband generation (HSG). A near-band gap continuous-wave (cw) laser with frequency $f_\text{NIR}$ was transmitted through an epitaxial layer containing GaAs/AlGaAs quantum wells that were driven by quasi-cw in-plane electric fields $F_\text{THz}$ between 4 and 50 kV/cm oscillating at frequencies $f_\text{THz}$ between 240 and 640 GHz. Frequency combs with teeth at $f_\text{sideband}=f_\text{NIR}+nf_\text{THz}$ ($n$ even) were produced, with maximum reported $n>120$, corresponding to a maximum comb span $>80$ THz. Comb spectra with the identical product $f_\text{THz}\times F_\text{THz}$ were found to have similar spans and shapes in most cases, as expected from the picture of HSG as a scattering-limited electron-hole recollision phenomenon. The HSG combs were used to measure the frequency and linewidth of our THz source as a demonstration of potential applications