Recently, studies of microalgae in China have increased a lot because of their obvious advantages over other biological fuels. In this paper, the combustion behavior of Chlorella vulgaris (a genus of unicellular green microalgae) was investigated in a thermogravimetric analyzer (TGA) from room...

By the concept of negativity, we investigate the thermal entanglement in the two-spin (12,s) Heisenberg XXX and XXZ models in the presence of Dzyaloshinskii–Moriya (DM) interactions respectively. Through calculation, we know that for the XXZ model, the Δ and s can be used together to control...

This work is concerned with a class of semilinear stochastic functional parabolic differential equations of retarded type. We first establish conditions to ensure the existence of a unique non-negative solution of the stochastic delay partial differential equation under investigation....

China's urban household saving rate has increased markedly since the mid-1990s and the age-savings profile has become U-shaped. To understand these patterns, we analyze a panel of urban Chinese households over the period 1989–2009. We document a sharp increase in income uncertainty, largely...

In 1998, Norway implemented the cash-for-care reform ("kontant stoette"), which provided cash to families with young children who did not use government-subsidized child care facilities. The reform resulted in a sizable exogenous change in the relative price of child care facilities, which...

I address the causes of the gender wage gap with a new dynamic model of wage, hours, and job changes that permits me to decompose the gap into a portion due to gender differences in preferences for part-time work and in onstraints. The dynamic model allows the differences in constraints to...

We show that cyclical skill mismatch, defined as mismatch between the skills supplied by college graduates and skills demanded by hiring industries, is an important mechanism behind persistent career loss from graduating in recessions. Using Norwegian data, we find a strong countercyclical...

We use experimental data from the Head Start Impact Study to examine the effects of childcare program pathways on cognitive outcomes. Using a sequential choice model with state dependence and dynamic selection, we identify and estimate joint returns and complementarities across skill investment...