search for: cserg

Displaying 5 results from an estimated 5 matches for "cserg".

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2008 May 12
1
hessian in constrained optimization (constrOptim)
...ptim". I would be extremely grateful if anybody could suggest a way I could use to I obtain the values of the hessian matrix... Many thanks, Carlo ************************************************** Carlo Fezzi Senior Research Associate Centre for Social Research on the Global Environment (CSERGE) Department of Environmental Sciences University of East Anglia Norwich (UK) NR2 7TJ Telephone: +44(0)1603?591408 Fax: +44(0)1603 593739
2010 Jan 07
1
faster GLS code
...to point out a way to make it faster (it is part of a bigger code and needs to run several times). Any suggestion would be greatly appreciated. Carlo *************************************** Carlo Fezzi Senior Research Associate Centre for Social and Economic Research on the Global Environment (CSERGE), School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ United Kingdom. email: c.fezzi at uea.ac.uk *************************************** Here is an example with 3 equations and 2 exogenous variables: ----- start code ------ N <- 1000 # number of observations libr...
2007 Dec 11
1
R computing speed
...ocess? (Modifying the code or modifying some R options maybe?) I would be really grateful if anybody could help me with this issue, I attach my code below. Many thanks, Carlo *************************************** Carlo Fezzi Centre for Social and Economic Research on the Global Environment (CSERGE), School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ United Kingdom. *************************************** # MULTILOGIT # This function computes the estimates of a multinomial logit model # inputs: a matrix vector of 1 and 0 (y) or of shares # a matrix of regr...
2012 Jan 17
2
bayesian mixed logit
...r BML with R and would like to share it with me or even take a quick look at my code? I would be extremely grateful for any help. Many thanks to everybody! Carlo *************************************** Senior Research Associate Centre for Social and Economic Research on the Global Environment (CSERGE),
2008 May 19
0
constrOptim converging not to the optimal values
...Optim(outer.iteration = 500, control = list(maxit=10000), theta=(high-low)/(N+1)* N:1, f=negdet, ui = u.s, ci=c.s, method="Nelder-Mead") #### ************************************************** Carlo Fezzi Senior Research Associate Centre for Social Research on the Global Environment (CSERGE) Department of Environmental Sciences University of East Anglia Norwich (UK) NR2 7TJ Telephone: +44(0)1603?591408 Fax: +44(0)1603 593739