search for: price2

Hi, I have two products which are substitudes. I try to fix a system as below to mydata. Demand1 = A1 -B1*Price1 + C1*Price2 Demand2 = A2 +B2*Price1 - C2*Price2 I would expect C1 & B2 to be symmetric, If they are truly substitude. How can I enforce this symmetry when creating a system of equations via SystemFit ? -- View this message in context: http://www.nabble.com/SystemFit-tp24588252p24588252.html Sent from th...

Hi, I am trying to run many different regressions using a FOR Loop. The input data that is read into R has the following variables · Volume · Price1 · Price2 · Price3 · Price4 · Price5 · Trend · Seasonality I want to run 5 regressions, with the Volume as an dependent variable and Price, Trend & Seasonality as independent variables. I have read the above mentioned variables in a variable called “tryout”...

...cbind because the rows are not the same replication occurs. Also if I have similar data how do I write a vlookup kind of function? I am giving an example below: Say Price1 file contains the following: Date Price 2/3/2010 134.00 3/3/2010 133.90 4/3/2010 135.55 And say price2 contains the following: Date Price 2/3/2010 2300 3/3/2010 3200 4/3/2010 1800 5/3/2010 1900 I want to take both these data together in a single file, and take the smaller vector (or matrix or dataframe??..i am new to R and still confused with the various obj...

...t;- function(FirstYear,OptimYear,x, NbOfFutureSimYear,         CentralLapseRate, ElasticityLeft,WindowLeft, WindowRight, ElasticityRight,           MarketPriceMean,Price,Commission,IndividualExp,IndivMeanLossAmount,           CPIRate,LossInflaRate,Beta,Alpha) { R <- numeric(NbOfFutureSimYear+1) Price2 <- numeric(NbOfFutureSimYear+1) CumulRetentionCoef <- numeric(NbOfFutureSimYear+1) Result <- numeric(NbOfFutureSimYear+1) delta <- OptimYear - FirstYear for (i in 1:(NbOfFutureSimYear+1)) {  k <-  delta + i     R[i] <- LapseRate(x[i], LapseType[k],CentralLapseRate[k],         Elas...