More Linked-In Q&A: Can anyone give me guidance on performing a two-stage least-squares analysis using Excel, Minitab 15, or Statistica 9? I’m taking an economics course and am required to perform this analysis, but only have experience in Excel. I’m not certain that Excel can handle this, so I downloaded trial versions of Minitab 15 and Statistica 9 but don’t have much experience with either program. Any guidance or instructions would certainly help. Thanks in advance… My answer: First, I will try to summarize what two-stage least squares regression (2SLS) is, for common understanding. 2SLS is a method for regression […]
John L. Taylor
177 posts
Again, I find myself drawn-in to a Linked-In question that forces me to clearly articulate my understanding: Question: Could some one explain the ARIMA forecasting model in a simplified manner? My Answer: An autoregressive integrated moving average (ARIMA) models are best understood in the context of Box–Jenkins methodology, who’s steps are as follows: Model identification and model selection. Parameter estimation. Model checking. Box–Jenkins methodology applies autoregressive moving average (ARMA) or ARIMA models to find the best fit of a time series to past values of a time series, in order to make forecasts and understand the underlying process/es. Briefly put, […]
These are my links for February 1st through February 2nd: Simulation-Based Definitions of Emergence – One approach to characterizing the elusive notion of emergence is to define that a property is emergent if and only if its presence can be derived but only by simulation. In this paper I investigate the pros and cons of this approach, focusing in particular on whether an appropriately distinct boundary can be drawn between simulation-based and non-simulation-based methods. I also examine the implications of this definition for the epistemological role of emergent properties in prediction and in explanation. The Sphere of Deviance | WNYmedia.net […]
These are my links for January 28th through February 1st: Keeping computers from ending science’s reproducibility – In recent years, scientists may have inadvertently given up on a key component of the scientific method: reproducibility. That’s an argument that’s being advanced by a number of people who have been tracking our increasing reliance on computational methods in all areas of science. An apparently simple computerized analysis may now involve a complex pipeline of software tools; reproducing it will require version control for both software and data, along with careful documentation of the precise parameters used at every step. Some researchers […]
These are my links for January 21st through January 28th: Shadow Government Statistics – Home Page – Have you ever wondered why the CPI, GDP and employment numbers run counter to your personal and business experiences? The problem lies in biased and often-manipulated government reporting Axiomatics and Progress in the Light of 20th Century Philosophy of Science and Mathematics.pdf (application/pdf Object) – This paper is a contribution to the question of how aspects of science have been perceived through history. In particular, I will discuss how the contribution of axiomatics to the development of science and mathematics was viewed in […]