In this paper, we propose two important measures, quantile correlation (QCOR) and quantile partial correlation (QPCOR). We then apply them to quantile au- toregressive (QAR) models, and introduce two valuable quantities, the quantile autocorrelation function (QACF) and the quantile partial autocorrelation function (QPACF). This allows us to extend the Box-Jenkins three-stage procedure (model identification, model parameter estimation, and model diagnostic checking) from classical autoregressive models to quantile autoregressive models.
In multivariate analysis, the covariance matrix associated with a set of vari- ables of interest (namely response variables) commonly contains valuable infor- mation about the dataset. When the dimension of response variables is con- siderably larger than the sample size, it is a non-trivial task to assess whether they are linear relationships between the variables. It is even more challenging to determine whether a set of explanatory variables can explain those relation- ships.
This paper studies the impact of electronic medical record (EMR) technologies on the productivity of physicians, using data from a 3-year study of about 90 physicians at a University hospital. We find that productivity drops sharply immediately after technology implementation, and recovers partly over the next few months.
UPDATE: Andrew Barkett is leaving his post as senior engineer at Facebook to bring his decade of experience in Silicon Valley to become the first-ever chief technology officer for the Republican National Committee.The June 4 announcement has stirred a whirlwind of media coverage, including the Huffington Post and Washington Post.Bark
Agilent Technologies’ Electronic Measurement Group is a $3.6 billion business that over the past decade has seen a dramatic shift in its customer base from U.S., and Western European customers to predominantly Asia-based customers. Today, the majority of the division’s revenues are generated outside of the U.S., with an increasing concentration in China.
(Davis, CA) — The UC Davis Graduate School of Management’s full-time MBA program has been ranked among the top six percent of AACSB International-accredited programs nationwide, according to U.S. News & World Report’s latest graduate business school rankings released today.