We test for an effect of Arizona’s 2007 Legal Arizona Workers Act (LAWA) on the proportion of the state’s population characterized as noncitizen Hispanic. We use the synthetic control method to select a group of states against which Arizona’s population trends can be compared. We document a notable and statistically significant reduction in the proportion of the Hispanic noncitizen population i...

As a follow-up to a recent paper considering two symmetric queues, the Shortest Queue First service discipline is presently analysed for two general asymmetric queues. Using the results previously established and assuming exponentially distributed service times, the bivariate Laplace transform of workloads in each queue is shown to depend on the solution M to a two-dimensional functional equati...

One concern with digitization in the cultural sector is that unauthorized, digital copying will disrupt cultural supply. This paper discusses the evidence for an impact of digital copying on the commercial supply of new, copyrighted sound recordings in Germany. The method is an intervention analysis for short time series. In spite of a severe recession in the primary market for sound recordings...

We analyze time series of investor expectations of future stock market returns from six data sources between 1963 and 2011. The six measures of expectations are highly positively correlated with each other, as well as with past stock returns and with the level of the stock market. However, investor expectations are strongly negatively correlated with model-based expected returns. The evidence i...

A new class of distributions motivated by systems having both series and parallel structures is introduced. Some mathematical properties the (including moment generating function, moments order statistics) are derived. Estimation addressed maximum likelihood method performance estimators assessed a simulation study. An illustration using three failure data sets shows usefulness class.

In order to provide an efficient conversion and utilization of solar power, solar radiation datashould be measured continuously and accurately over the long-term period. However, the measurement ofsolar radiation is not available to all countries in the world due to some technical and fiscal limitations. Hence,several studies were proposed in the literature to find mathematical and physical mod...