probit

  1. L

    Logit, probit or what?

    Hi everyone, I would like to here someone's opinion on the following matter. I am carrying out a research paper in finance on the investment style of mutual funds. I am trying to use a holdings-based analysis according to which each fund is classified on the basis of the underlying...
  2. J

    Is there any other way to get LD50 for these cases when Probit does not yield results

    To determine a lethal dose 50 (LD50) (ie the dose or concentration of a compound that kills 50% of the insects) I have done a Probit regression. In some cases, the p square CHI is > 0.05 or the statistical programs for do Probit regression does not yield any result. This behavior does not change...
  3. T

    Some basic questions about a econometric analysis of paneldata

    For a research project in economics, I want to study the several determinants that affect the decision to enter the private rental housing market in the United States. There is a special focus on taxation. In the analysis, I am using unbalenced (survey) panel-data from the PSID (Panel Study...
  4. M

    Unimodal Link-function possible?

    Hi, using a GLM model (e.g. a Poisson regression), there are various link functions available in statistical packages. However, I don't find an unimodal depedency ("Normal/Gaussian link"), and I always have to approximate an unimodal relationship with polynomial terms. Does somebody know why...
  5. J

    Help with interpreting results of a bivariate probit regression please

    I have recently run this regression using Stata and the command biprobit. However, I am a complete newbie to statistics and I need some help interpreting the results. I am mostly confused by the Rho and Wald Chi2 results. A simple explanation would be much appreciated. I have attached a...
  6. B

    Stata help! trying to make any specification for probit

    I am trying to see the relationship between job promotion and several x variables. I recoded Y to promo as 0 and 1 and with x variables I ran probit. Now I am stuck with specification. I am trying to make specification to compare unrestricted and restricted model. Any help will be very...
  7. U

    Statistical Analysis help for thesis - Correlation, Probit, Tobit and Moderation

    Hello Talkstats users! I am writing here cause I need some guidance on my statistical analysis which has turned out far too complex for my basically begineer stats skills and my self research. Before I ask my specific, I will give some background to my work. The scope of my analysis is to...
  8. O

    Heckman selection model - suitable for categorical and continuous DVs?

    Hello everyone, I am trying to figure out whether Heckman selection can be and should be used for my data. I have the same group of investors who are first of all asked about their willingness to invest in a specific project (on a 1-7 scale) and afterwards, after being presented with...
  9. K

    Probit model - threshold

    Hi, I am working with a binary outcome model so yi takes the value 1 or 0. Xi is a vector of 8 explanatory variables and Beta (B) is a vector of 9 parameters (8 variables +intercept). I am working with the probit model so F(X'B)=standard normal c.d.f. Next; Let y(hat)i be equal to...
  10. J

    Five Category Ordered Probit Log Likelihood Function in R Help : Survey Data Research

    I am currently working with some survey data that has a 5 category scale. I have used a ML method before for a 4 category scale and I am trying to adapt the code for the new survey in R. The original code that worked was: #Load Data mathcomp <- read.csv("RRawComposite11.csv"...
  11. E

    Probit regression with sparse data - Should i standardize data or ??

    I am trying to create a probit model (later other models like logit, cloglog and weirder stuff will be tried feel free to make suggestions!), the data is very sparse, ie. many of the coviarate are often 0 and they are often also of a binary structure (i have less than 15 explanatory variables)...
  12. R

    How to conduct mediation analysis with ordinal (probit) regressions

    Hello everyone, I need to conduct a mediation analysis in which all the variables (i.e., the predictor, mediator, and outcome) are single items measured on 4-point Likert type scales (i.e., strongly disagree, disagree, agree, strongly agree). I have conducted ordinal (probit) regression...
  13. R

    Heckman 2 step procedure - how to formulate probit model for real estate?

    Dear all, I'm doing research on the attributes that determine listing prices of houses. Price is updated to the current date and independent variables are structural (e.g. surface, building year), related to the neighborhood of houses (e.g. density of population in neighborhood, distance to...
  14. R

    Probit Analysis Help

    Can someone help on Probit analysis in the toxicity of Copper sulfate pentahydrate on brine shrimp? I am just a Hisg school student and I really dont know how to use the Probit Analysis on my Statistics page in my Research. I am currently conducting a study on "Lethal Dose of Copper sulfate...
  15. A

    Probit Analysis

    Greetings, My dependent variable is a binary variable (Yes/No). I chose to do a *Probit* analysis, in STATA. Thus, I started by picking some ordered categorical variables from my dataset as my independent variables that I considered relevant. Then,I run the Probit regression including dummy...
  16. L

    Problems with predicted probability logit/probit

    Hi I have to process a probit regression with 10 variables, 2 continuous, 6 dummies and 2 categorical. So I process xi: probit y x1 x2 x3 x4 x5 x6 x7 x8 i.x9 i.x10 After I want to have the predected probability for the variables' coefficients. Which command shall I use? Margins (but it...
  17. L

    xtprobit regression with a cluster

    Hello everybody, I have a huge problem that I hope you can help me to solve, since I have not found anything helpful in the web. I have a WIDE dataset, made of: - a variabile called "people" (with 660names) - 32 variables, called "action1".."action32", with value = 1 or = 0 (in order to...
  18. V

    Using probit model

    Could anybody explain to me how to work with a model based on probit analysis? I have for example a model like this: Z=-2,067-2,324x+3,213y+1,782v (x, y, v will be replaced by measured values) and I would like to get a probability. I know I have to use several steps but i have no idea which...
  19. V

    Probit model -how to use

    I am trying to understand how to interpret the result of Zmijewski bankruptcy prediction model based on probit model. Wanda A. Wallace wrote in this document (page 8) that it is necessary to multiply each parameter by 1.8138 and then use one more step to get the right result. I am wondering...
  20. D

    Willingness To Pay is out of ranges of bids asked in survey

    Hello, I'm trying to estimate the willingness to pay (WTP) for whale watching by using a probit model (the results are similiar with a logit). But the WTP estimated is out of the bid levels asked in the survey, which were 10, 20, 30, 40, 50 and 60 USD, but my estimate WTP results in 100 USD. So...