U.S. Earnings Mobility: Comparing Survey-Based and Administrative-Based Estimates

Earnings mobility has been studied both at the macro level (how much of a certain kind of mobility is there in the economy?) and at the micro level (what are the correlates of change in income or position?). Many empirical mobility studies provide estimates of the amount of mobility in a country over time and the correlates of individual mobility within the income distribution. While measurement error is recognized as potentially important at both these levels, very little is known about the degree to which earnings mobility estimates are affected by measurement error. In this paper, we use a new dataset that contains individually reported total annual labor earnings from the Survey of Income and Program Participation (SIPP) linked to employer-reported total annual labor earnings from the Social Security Administration’s Detailed Earnings Record (DER; these are taken directly from Box 1 on theW-2 form and are not capped by FICA) to compare micro and macro earnings mobility estimates for the U.S. during the 1990s using the two different earnings measures. We ask how much difference it makes to mobility estimates to use administrative-based earnings rather than survey-based earnings, and we obtain two major findings. Qualitatively, we find that the results are similar but not identical when administrative-based earnings are used rather than survey-based earnings. Quantitatively, we find that magnitudes are often very different when administrative-based earnings are used rather than survey-based earnings. The administrative-based results are neither systematically larger nor systematically smaller than the survey-based ones.earnings mobility, measurement error, macro mobility, micro mobility.

U.S. Earnings Mobility: Comparing Survey-Based and Administrative-Based Estimates

Earnings mobility has been studied both at the macro level (how much of a certain kind of mobility is there in the economy?) and at the micro level (what are the correlates of change in income or position?). Many empirical mobility studies provide estimates of the amount of mobility in a country over time and the correlates of individual mobility within the income distribution. While measurement error is recognized as potentially important at both these levels, very little is known about the degree to which earnings mobility estimates are affected by measurement error. In this paper, we use a new dataset that contains individually-reported total annual labor earnings from the Survey of Income and Program Participation (SIPP) linked to employer-reported total annual labor earnings from the Social Security Administration’s Detailed Earnings Record (DER) to compare micro and macro earnings mobility estimates for the U.S. during the 1990s using the two different earnings measures. We ask how much difference it makes to mobility estimates to use administrative-based earnings rather than survey-based earnings, and we obtain two major findings. Qualitatively, we find that the results are similar but not identical when administrative-based earnings are used rather than survey-based earnings. Quantitatively, we find that magnitudes are often very different when administrative-based earnings are used rather than survey-based earnings. The administrative-based results are neither systematically larger nor systematically smaller than the survey-based ones

Validating U.S. Earnings Mobility Measures

Earnings mobility has been studied at both the macro level (the amount of mobility in an economy) and the micro level (the correlates of individuals’ income changes). While measurement error is recognized as potentially important at both these levels, very little is known about the degree to which earnings mobility estimates are affected by measurement error. We compare micro and macro earnings mobility estimates for the U.S. during the 1990s using both survey-based earnings and administrative-based earnings. We find that measurement error in survey-based earnings has little qualitative effect on mobility estimates, but often has a large quantitative effect

A new approach to analyzing solar coronal spectra and updated collisional ionization equilibrium calculations. II. Additional ionization rate coefficients

We have reanalyzed SUMER observations of a parcel of coronal gas using new collisional ionization equilibrium (CIE) calculations. These improved CIE fractional abundances were calculated using state-of-the-art electron-ion recombination data for K-shell, L-shell, Na-like, and Mg-like ions of all elements from H through Zn and, additionally, Al- through Ar-like ions of Fe. They also incorporate the latest recommended electron impact ionization data for all ions of H through Zn. Improved CIE calculations based on these recombination and ionization data are presented here. We have also developed a new systematic method for determining the average emission measure ($EM$) and electron temperature ($T_e$) of an isothermal plasma. With our new CIE data and our new approach for determining average $EM$ and $T_e$, we have reanalyzed SUMER observations of the solar corona. We have compared our results with those of previous studies and found some significant differences for the derived $EM$ and $T_e$. We have also calculated the enhancement of coronal elemental abundances compared to their photospheric abundances, using the SUMER observations themselves to determine the abundance enhancement factor for each of the emitting elements. Our observationally derived first ionization potential (FIP) factors are in reasonable agreement with the theoretical model of Laming (2008).Comment: 147 pages (102 of which are online only tables and figures). Submitted to ApJ. Version 2 is updated addressing the referee's repor

Production mechanisms and single-spin asymmetry for kaons in high energy hadron-hadron collisions

Direct consequences on kaon production of the picture proposed in a recent Letter and subsequent publications are discussed. Further evidence supporting the proposed picture is obtained. Comparison with the data for the inclusive cross sections in unpolarized reactions is made. Quantitative results for the left-right asymmetry in single-spin processes are presented.Comment: 10 pages, 2 Postscript figure

Resonance phenomena in ultracold dipole-dipole scattering

Elastic scattering resonances occurring in ultracold collisions of either bosonic or fermionic polar molecules are investigated. The Born-Oppenheimer adiabatic representation of the two-bodydynamics provides both a qualitative classification scheme and a quantitative WKB quantization condition that predicts several sequences of resonant states. It is found that the near-threshold energy dependence of ultracold collision cross sections varies significantly with the particle exchange symmetry, with bosonic systems showing much smoother energy variations than their fermionic counterparts. Resonant variations of the angular distributions in ultracold collisions are also described.Comment: 19 pages, 6 figures, revtex4, submitted to J. Phys.

Final state interactions and the transverse structure of the pion using non-perturbative eikonal methods

In the factorized picture of semi-inclusive hadronic processes the naive time reversal-odd parton distributions exist by virtue of the gauge link which renders it color gauge invariant. The link characterizes the dynamical effect of initial/final-state interactions of the active parton due soft gluon exchanges with the target remnant. Though these interactions are non-perturbative, studies of final-state interaction have been approximated by perturbative one-gluon approximation in Abelian models. We include higher-order contributions by applying non-perturbative eikonal methods incorporating color degrees of freedom in a calculation of the Boer-Mulders function of the pion. Using this framework we explore under what conditions the Boer Mulders function can be described in terms of factorization of final state interactions and a spatial distribution in impact parameter space.Comment: To appear in Phys.Lett.B, 9 pages, 5 figures, added refs. and discussio

Transverse spin dependence of pp total cross‐sections

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87331/2/72_1.pd

Transverse Polarisation of Quarks in Hadrons

We review the present state of knowledge regarding the transverse polarisation (or transversity) distributions of quarks. After some generalities on transverse polarisation, we formally define the transversity distributions within the framework of a classification of all leading-twist distribution functions. We describe the QCD evolution of transversity at leading and next-to-leading order. A comprehensive treatment of non-perturbative calculations of transversity distributions (within the framework of quark models, lattice QCD and QCD sum rules) is presented. The phenomenology of transversity (in particular, in Drell-Yan processes and semi-inclusive leptoproduction) is discussed in some detail. Finally, the prospects for future measurements are outlined.Comment: small changes, references added, as finally published in Physics Report

Tensorial form and matrix elements of the relativistic nuclear recoil operator

Within the lowest-order relativistic approximation ($\sim v^2/c^2$) and to first order in $m_e/M$, the tensorial form of the relativistic corrections of the nuclear recoil Hamiltonian is derived, opening interesting perspectives for calculating isotope shifts in the multiconfiguration Dirac-Hartree-Fock framework. Their calculation is illustrated for selected Li-, B- and C-like ions. The present work underlines the fact that the relativistic corrections to the nuclear recoil are definitively necessary for getting reliable isotope shift values.Comment: 22 pages, no figures, submitted to J. Phys.