search for: attrition

Hi There - New to the list, so hopefully I don't mess this up too much ... I am hoping maybe some of you can help me. I have a problem I'm trying to solve regarding customer accounts, attrition and forecasting. Basically, here is what I want to do (not sure of the best way): 1. Track accounts by vintage (i.e., the month of the date of sale). 2. Forecast total accounts at a given time utilizing 1. and attrition rates. So, for example, I have a vector of accounts: a <- c(346, 742, 447...

Hi, I am trying to do some predictive modeling around attrition and want to split the dataset into test and train (80:20) and keep the ratio of attritees:non attrites same. In my dataset the attrition indicator is coded as 0(for non-attritees) and 1 (for attritees) and I want to keep the ratio of 0's to 1 similar. I apologize for this trivial question but t...

Dear R community I am using the gee package to run logistics regression on paired cases from a panel sample. We are getting request from a reviewer to use sample weights to account for different level of attrition. After searching the documentation I am unable to find a way to incorporate sample weights into the gee formula. I found a way to incorporate precision weight but I understand that I cant use that function for sample weight. I appreciated all help on this issue. Regards Stefan Jonsson [[altern...

Hope this isn't too far OT, but its relevant to us. From isn.attrition.org >http://www.informationweek.com/story/showArticle.jhtml?articleID=20300851 > >By W. David Gardner >TechWeb News >May 13, 2004 > >As voice over IP sweeps across the high-tech landscape, many IT >managers are being lulled into a dangerous complacency because they >lo...

...t with observations on 549 cities spanning an 18 year period. However, some of cities did not report in one or more of the 18 years. I would like to implement the procedure suggested by Wooldridge section 17.1.3 in his "Econometric analysis of cross section and panel data" to correct for attrition. For example the table below indicates that the 3rd and the 7th cities in the data set do not have observations for several years. The Wooldridge procedure requires the generation of a selection variable that takes on the value of 1 if the city reports in that year and 0 otherwise. How do I assign...

...sources, and is almost perfect as-is. Frank PS.. The tag line about MS vista probably comes from hotmail (I doubt xiph is doing it). They recently switched to "hotmail live" or some BS like that. I do not endorse MS products and have not worked for them since 2003 (the reason for the attrition of my command line abilities). Date: Fri, 28 Sep 2007 13:48:42 +0200 From: tranzedude@gmail.com To: lists@whitehouse.org.nz Subject: Re: [flac] re-encode tool win32 CC: russofris@hotmail.com; flac@xiph.org 2007/9/28, Aaron Whitehouse <lists@whitehouse.org.nz>: > Under linux/bash, it w...

Hi all, I a semi-beginner with R and I am working with the plm package to examine a longitudinal dataset. Each individual in this dataset has a longitudinal weight for the probability that he or she remains in the sample. Unfortunately, I have not found an argument to use weights in the plm function? I tried ?weights=? like in standard lm or in nlme or lm4 but it does not work. I asked the

We are about to abandon GlusterFS as a solution for our object storage needs. I'm hoping to get some feedback to tell me whether we have missed something and are making the wrong decision. We're already a year into this project after evaluating a number of solutions. I'd like not to abandon GlusterFS if we just misunderstand how it works. Our use case is fairly straight forward.

...iefly. How can use the weighting function in the lme function for my purpose? My variables are id for each individual, year, age (and age squared to age quartic) and (to begin with) constant weights for each individual. I would prefer to use yearly changing weights per individual to capture better attrition. Do my weights have to be constant in nlme for every individual (just as in xtreg in Stata)? My main variables: id year income age cross-sectional weight longitudinal weight Are you aware of any other packages in R which provide the opportunity to examine longitudinal data with sample weights?...

...f heads the "TI Pharma mechanism-based PK-PD modeling platform". Our unique platform will house a shared database for the purpose of mechanism-based PK-PD model building. As underscored in the Critical Path to New Medicines report by the FDA, our models are essential to revert the current attrition rate of new drugs and will result in less in vivo testing, increase effectiveness of clinical trials and will assist clinicians in the treatment of progressive diseases and of vulnerable patients such as children. This public private research partnership is a collaborative effort of four outstandin...

...tion of campaign success. ? Perform ad hoc and recurring analysis and reporting of customer data to monitor key performance indicators and trends. ? Develop ad hoc advanced analysis of customer data to support hypotheses for opportunities in customer value management, e.g., acquisition, retention, attrition, and demographic/firmographic and behavioral profiles: includes customer segmentation and advanced modeling. ? Conduct experimental design in order to test & learn the best marketing tactics. ? Participate in building, maintaining, and improving reporting/data processes, including new campaign...

RE Message: 5 Date: Sat, 7 May 2005 23:18:46 -0400 From: Andrew Kohlsmith akohlsmith-asterisk@benshaw.com Subject: Re: [Asterisk-Users] At home Asterisk via Broadvoice? To: asterisk-users@lists.digium.com On May 7, 2005 11:04 pm, John Stegenga wrote: > Broadvoice will give me 2 lines, with 2 phone numbers each - distinctive > ring - for a reasonable fee... Please do a google search for

...Issues in the Steel Industry with Perspectives on Six Sigma Linus Nilsson Capgemini Fault Detection in Industrial Process Plants using CART and MARS Larry Lai, DIRECTV, Inc. Variable Derivation and Selection For Customer Churn Models Jon Farrar Union Bank's Use of CART to Identify Customer Attrition and Screen Application Fraud BIOMEDICAL PRESENTATIONS: Data Mining for Epidemiological Research: Identifying Relationships That Cannot Be Identified In Any Other Way Shenghan Lai, Johns Hopkins Medical School Drug Discovery Clinical Trials and Random Forests at Novartis John Warner, Novartis Mo...

I'm wondering how prevalent the practice of physically segregating voice and data networks is in the Real World. What are the factors that typically lead to such a decision? DIscussions of pros and cons are most welcome by me. Experiences, anybody? -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 3234

2007/9/28, Aaron Whitehouse <lists@whitehouse.org.nz>: > > > Under linux/bash, it would be something like.... > > cd /MusicDirectory > > find . -type f -name "*.flac" -exec sh -c 'flac -t {} && flac -8V {}' > \; > > Wouldn't it be nice if it was something closer to: > flac --reencode --recursive -8 *.flac I think this would

Hi, I'm a very fresh newbie to R. My first main question is, what the limitations of R are, what methods can R NOT do, esp. compared to (a) SPSS and (b) SAS? The second question is, how do you handle the data entry, data management and data manipulation in R, to me it seems to be really complicated and confusing?! Are there a kind of "helping tools"? The third question: are