The effect of the run-up in the stock market on labor supply

This article presents estimates of the effect of the run-up in the stock market on labor supply. The authors find that, in the absence of a run-up in the stock market, aggregate labor force participation rates would have been about 1 percent higher than they are today.Labor supply ; Stock market

The Tensor Rank of the Tripartite State ∣W⟩⊗n\ket{W}^{\otimes n}}

Tensor rank refers to the number of product states needed to express a given multipartite quantum state. Its non-additivity as an entanglement measure has recently been observed. In this note, we estimate the tensor rank of multiple copies of the tripartite state $\ket{W}=\tfrac{1}{\sqrt{3}}(\ket{100}+\ket{010}+\ket{001})$. Both an upper bound and a lower bound of this rank are derived. In particular, it is proven that the tensor rank of $\ket{W}^{\otimes 2}$ is seven, thus resolving a previously open problem. Some implications of this result are discussed in terms of transformation rates between $\ket{W}^{\otimes n}$ and multiple copies of the state $\ket{GHZ}=\tfrac{1}{\sqrt{2}}(\ket{000}+\ket{111})$.Comment: Comments: 3 pages (Revtex 4). Minor corrections to Theorem 1. Presentation refined. Main results unchanged. Comments are welcom

Completing incomplete cohort fertility schedules

This paper develops a simple age-period-cohort framework in completing incomplete cohort fertility schedules, and makes full use of 1917--2005 U.S. data to obtain robust outcomes. Empirically, we indicate that the period effect is the key to transforming a fertility level into a fertility schedule. Accompanied by the smoothed version of tempo-variance-adjusted total fertility rates proposed in Kohler and Philipov (2001), we approximate the cohort fertility schedules fairly well and the estimates of all distributional parameters can be thereby obtained. Our approach is easy to implement and the data requirement is relatively light, indicating that the proposed method is readily applicable to countries whose data lengths are insufficiently long, and would be helpful for further empirical investigation of the relationship between cohort fertility behavior and other cohort-specific socioeconomic factors.APC model, cohort fertility schedule, fertility forecast

Electrical power dissipation in carbon nanotubes on single crystal quartz and amorphous SiO2

Heat dissipation in electrically biased semiconducting carbon nanotubes (CNTs) on single crystal quartz and amorphous SiO2 is examined with temperature profiles obtained by spatially resolved Raman spectroscopy. Despite the differences in phonon velocities, thermal conductivity and van der Waals interactions with CNTs, on average, heat dissipation into single crystal quartz and amorphous SiO2 is found to be similar. Large temperature gradients and local hot spots often observed underscore the complexity of CNT temperature profiles and may be accountable for the similarities observed

Contingency theory is of little value in helping leaders or potential leaders to perform successfully

Contingency Theory does not provide a recipe to problems, but some argue that it could provide an action list. I am going to discuss the Contingency Theory of leadership in the light of whether it enhances performance. Contingency Theory is one that if we know which particular leadership style in a particular situation is more appropriate, the leader will adjust his behaviour to the situation in order to enhance performance, subordinate\u27s job satisfaction, etc. The beginning section of the essay will be devoted to a literature review and a discussion on the theoretical framework on the three approaches of the Contingent Theory. Later cases indicate how Contingency Theory was applied, or was ostensibly applied to the dministration of an academic section in a university in Hong Kong. The essay concludes by identifying practices which might enhance performance of contingent leaders