BJ Data Tech Solution

Specialized on Data processing, Data management Implementation plan, Data Collection tools - electronic and paper base, Data cleaning specifications, Data extraction, Data transformation, Data load, Analytical Datasets, and Data analysis. BJ Data Tech Solutions teaches on design and developing Electronic Data Collection Tools using CSPro, and STATA commands for data manipulation. Setting up Data Management systems using modern data technologies such as Relational Databases, C#, PHP and Android.

  • Home
  • Data Management
  • Data Analysis
  • Data Collection Tools Tips
What stats are appropriate to assess model fit for nested logit models if Wald is not possible for clustered data?

What stats are appropriate to assess model fit for nested logit models if Wald is not possible for clustered data?

Friday, November 30, 2018 Data Cleaning Data management Data Processing
I used vce(cluster) to account for clustering within 9 groups in a set of nested logistic regression models. Stata doesn't want to give ...
How do I combine observations within a dataset?

How do I combine observations within a dataset?

6:50 PM Data Cleaning Data management Data Processing
Hi all, I appended two datasets based on ID. I was not able to merge these datasets, because ID did not identify individual observations. ...
Difference between catplot and tabplot

Difference between catplot and tabplot

5:30 PM Data Cleaning Data management Data Processing
Dear Stata users, I have a dataset comprised of two variables, the foobarx variable is what I concerned, the type variable is an indicator...
I created a YouTube video on using CODE delimiters & dataex – looking for feedback on making it better

I created a YouTube video on using CODE delimiters & dataex – looking for feedback on making it better

3:45 PM Data Cleaning Data management Data Processing
Hi everyone, It seems like using the CODE delimiters and -dataex- is a hurdle for new posters (particularly -dataex-). I've tried to h...
Predicting residuals of an EGARCH model for panel data using rangerun/rangestat

Predicting residuals of an EGARCH model for panel data using rangerun/rangestat

1:40 PM Data Cleaning Data management Data Processing
Hello Statalisters, My data is daily panel data that consists of 379 firms: Code: * Example generated by -dataex-. To install: ssc in...
Workshop on interpreting intetraction effects

Workshop on interpreting intetraction effects

1:35 PM Data Cleaning Data management Data Processing
Workshop: Interpreting Interaction Effects with ICALC March 29-30, 2019 Philadelphia Instructor: Robert L. (Bob) Kaufman Hosted by: Depa...
threshold, gaps not allowed

threshold, gaps not allowed

12:35 PM Data Cleaning Data management Data Processing
Hi everyone, I'm doing threshold model with the command "threshold" in Stata15.1, my data is strongly balanced, time is cont...
2019 German Users Group Meeting

2019 German Users Group Meeting

12:25 PM Data Cleaning Data management Data Processing
_________________________________ 2019 GERMAN USERS GROUP MEETING _________________________________ Date: May 24, 2019 Venue: Ludwig-...
Finding a mean when values are repeated

Finding a mean when values are repeated

9:55 AM Data Cleaning Data management Data Processing
Hello, I have data involving auctions and contracts. My task is to find the average of the winning bids. So, I used this code to get a for...
does an independent variable predict dependent variable 1 or 2 better

does an independent variable predict dependent variable 1 or 2 better

8:30 AM Data Cleaning Data management Data Processing
Dear all, I am running the below 2 models in Stata. They have different dependent variables, and some similar independent variables (certa...
Optimize() on a segment

Optimize() on a segment

7:55 AM Data Cleaning Data management Data Processing
Hello, I would like to maximize my function of a specific segment, let's say [a,b]. Does anyone know how to do this in mata? Best re...
ICC in mi estimate meqrlogit

ICC in mi estimate meqrlogit

7:40 AM Data Cleaning Data management Data Processing
Hi all, I have successfully imputed values and run the mi estimate meqrlogit for multilevel analysis, but now I am having troubles to inve...
fix effect and clustering residuals

fix effect and clustering residuals

6:15 AM Data Cleaning Data management Data Processing
Hello all, I have a panel of prices of 4 products, in 200 towns, posted by 20 compnies for 12 month. I would like to have s fix effect o...
3SLS with non-continuous endogenous variables

3SLS with non-continuous endogenous variables

6:15 AM Data Cleaning Data management Data Processing
Hello Everyone, Much thanks for the opportunity provided for clarification of doubts and guidance on data analysis. I am specifying a sys...
Interpretation of Interaction terms

Interpretation of Interaction terms

5:35 AM Data Cleaning Data management Data Processing
Dear Statalisters I run following regression for panel data of children: PPVT being a test score, a treatment they get and sex being =1 of...
Sts graph truncate

Sts graph truncate

5:35 AM Data Cleaning Data management Data Processing
Ciao, I am conduct survival analysis and need to truncate x-axis. The survival time data I have obtained start at a time of 5 but sts graph ...
regression of the panel data: dependent variable and independent variable is the same variable in different group

regression of the panel data: dependent variable and independent variable is the same variable in different group

3:40 AM Data Cleaning Data management Data Processing
Hi, I am now running a panel regression, for example, return in year 2018=c+return in year 2010-2017+e. And year 2010-2017 is categorized as...
help me whit stata command

help me whit stata command

3:40 AM Data Cleaning Data management Data Processing
dear statalist it's my first job with been I'm not very practical I am working on a panel data to understand how the introductio...
Standardised independent variables using logistic regression

Standardised independent variables using logistic regression

3:00 AM Data Cleaning Data management Data Processing
I am running a model in which I want to check the substantive effect of the different independent variables. I know my corevar is statistic...
Rescaling

Rescaling

2:25 AM Data Cleaning Data management Data Processing
Hi Statlist! Is there a way to rescale the x and y axis in order to show them in in Millions dollars rather than in the format I have in t...
the exponential model, using the NLS, poisson and gamma QML estimators

the exponential model, using the NLS, poisson and gamma QML estimators

12:05 AM Data Cleaning Data management Data Processing
Dear all, I have a question related to the estimation of the exponential model. This is related to this thread: https://www.statalist.org...
Sampling using sample command

Sampling using sample command

Thursday, November 29, 2018 Data Cleaning Data management Data Processing
Hello Everyone, I have a dataset which has data for 100 households from each of 3 cities. Further, 5 members from each household are liste...
Incidence rate

Incidence rate

8:50 PM Data Cleaning Data management Data Processing
Dear All,ho I used survival analysis to estimate the incidence of mother-to-child transmission of HIV. I used the command "stptime...
Inquire about uniform random-number generation

Inquire about uniform random-number generation

8:20 PM Data Cleaning Data management Data Processing
The textbook (microeconometrics using stata) said, For reproducibility of results, however, it is best to actually set the initial seed...
Returns to education regression

Returns to education regression

8:00 PM Data Cleaning Data management Data Processing
Hi everyone, I am new to STATA and have a question about a returns to education regression I would like to run. My goal is to find out if re...
URGENT help needed with university data analysis coursework

URGENT help needed with university data analysis coursework

5:50 PM Data Cleaning Data management Data Processing
Here's the deal. I am an absolute noob when it comes to using Stata, having used it only once in my life. My coursework is due very soon...
How to analyze intergroup interaction in subgroup analysis pf meta-analysis (metan, network)

How to analyze intergroup interaction in subgroup analysis pf meta-analysis (metan, network)

4:45 PM Data Cleaning Data management Data Processing
Hi, I would like to conduct a subgroup analysis of meta-analysis and check intergroup interaction. I'm using metan or network for th...
Heckman model

Heckman model

4:10 PM Data Cleaning Data management Data Processing
Dear Stata Users, I am applying the two step Heckmam model, but I am having a problem. After having completed the Heckman model. As fu...
statistical significance

statistical significance

3:10 PM Data Cleaning Data management Data Processing
Hi, How check in stata statistical significance between price and country of origin from data stata.auto ?
How to test correlation between two variables – Panel data

How to test correlation between two variables – Panel data

2:55 PM Data Cleaning Data management Data Processing
Hi all! I wonder how it is possible to test for correlation between two variables (panel data). What is the praxis in this case? Do I run ...
xtoprobit vs xtreg, fe

xtoprobit vs xtreg, fe

2:40 PM Data Cleaning Data management Data Processing
I want to run a fixed effects regression model in stata using panel data to examine the change in individuals' responses over time. My d...
Add Confidence intervals to median spline

Add Confidence intervals to median spline

2:01 PM Data Cleaning Data management Data Processing
I would like to add 95% confidence intervals to a median spline. It does not appear to be an option of mspline and the other confidence inte...
Using maps to present incidence rates

Using maps to present incidence rates

1:45 PM Data Cleaning Data management Data Processing
Hi everyone I have calculated incidence rates (per 100 000 person years) for disease X by regions in Norway and want to present them in a ...
Test: latex

Test: latex

1:25 PM Data Cleaning Data management Data Processing
If there are \(\pm 1\%\)
Hausman test

Hausman test

12:30 PM Data Cleaning Data management Data Processing
Hey, when running the hausman test, should I include all variables? So dependent, independent, moderator (how? with #?) and controll variabl...
Use e(selected0) of Lasso Regression in another regression

Use e(selected0) of Lasso Regression in another regression

11:55 AM Data Cleaning Data management Data Processing
Hello, I ran a Lasso Regression and found the best regressors: rlasso a b c d e f Assume b c d are selected as best regressors. I can ...
Extract Year from Date (11985 - 122018)

Extract Year from Date (11985 - 122018)

10:55 AM Data Cleaning Data management Data Processing
Hello, I am working with the BRFS data. I am interested in using a variable - Recent HIV testing. The variable is recorded in month&d...
Inconsistency of data in national survey

Inconsistency of data in national survey

8:40 AM Data Cleaning Data management Data Processing
Good morning, sorry I am dealing with a topic of inconsistency of data generated by me with those generated by the report according to regio...
Generating data to balance a panel dataset

Generating data to balance a panel dataset

7:55 AM Data Cleaning Data management Data Processing
Hi, I have a panel from Compustat like the below in Table 1 (table 1 is a subset of the data to show 3 different example issues), where gv...
Getting different results from running same exact code - why?

Getting different results from running same exact code - why?

7:45 AM Data Cleaning Data management Data Processing
I am dropping observations based on various if statements written in a do file. I have all the code in the do file highlighted and run it. A...
Running Diebold Mariano test using panel data.

Running Diebold Mariano test using panel data.

7:40 AM Data Cleaning Data management Data Processing
Hi everyone, I am totally new here and very new to Stata, nice to meet you all. This maybe a very simple question, I am sorry if this make...
Latent class and standard erros

Latent class and standard erros

6:45 AM Data Cleaning Data management Data Processing
Dear Stata users, I am running a latent class analysis with gsem command. I had some problems on convergence reported in a previous post, b...
hybrid model pseudo-panel.

hybrid model pseudo-panel.

5:55 AM Data Cleaning Data management Data Processing
hello! this might sound like a silly question, but I was wondering if one might be able to fit a hybrid model (xthybrid) also when dealing...
Dynamic panel data model with xtabond2/ivreg2/Difference-in-Hansen test

Dynamic panel data model with xtabond2/ivreg2/Difference-in-Hansen test

5:40 AM Data Cleaning Data management Data Processing
Dear all, I am using an unbalanced panel data with T=11 and N=200,000 to estimate a dynamic panel data model with the xtabond2 command (wit...
How to create a time dimension in one cross-sectional dataset with individual ID, more than one job, each with a starting and ending year

How to create a time dimension in one cross-sectional dataset with individual ID, more than one job, each with a starting and ending year

5:35 AM Data Cleaning Data management Data Processing
How to create a time dimension in one cross-sectional dataset with individual ID, more than one job, each job with a starting year and endin...
why I would have different number of cases between models with MI'd data (possibly because of collinear dependencies of one varaible)?

why I would have different number of cases between models with MI'd data (possibly because of collinear dependencies of one varaible)?

5:01 AM Data Cleaning Data management Data Processing
Hi Statalist, I am running three logistic models with the same DV with Stata 12. Model 1 has all variables but the control variables. Mo...
Problem of handling missing data

Problem of handling missing data

3:21 AM Data Cleaning Data management Data Processing
Hi everyone, I am currently working on looking at the impact of intellectual property rights on the Indian pharmaceutical industry. I have ...
Newer Posts Older Posts Home
Subscribe to: Posts (Atom)

Latest Articles

Categories

  • CouchDb Skills
  • Data Analysis
  • Data Cleaning
  • Data management
  • Data Processing
  • Research Methodology

Popular Articles

  • How to drop random years from panel data?
    I have a panel data set, consisting of 125 countries, 36 years. I want to run an IV regression multible times and randomly drop 5 (of the 36...
  • Saving pointer matrixes using -mata matsave-
    I am relatively new to the use of pointers in Mata and have thusfar been impressed with their utility. Specific to this query, I have been...
  • instrumenting a binary endogenous regressor
    Hello, I am trying to run a model with a binary endogenous regressor. I am still learning econometrics so I am sorry if this may be a trivi...
  • "tsegen" by group
    Hi, I would like to calculate the moving average of _b_LogSize _b_LogBM _b_MOM12 _b_cons by months of the year over the last 10 years. For...
  • Fixed Effects for a Panel at a Coarser Level
    Hello, I want to include some fixed effects in my model that I believe are difficult to include so any advice on how exactly this can be d...
  • RDD rdrobust problem
    Dear all, I am researching the effect of grade retention on exam results (which can vary from 0 to 20) and I am using a RDD to research th...
  • Growth model - No convergence
    I would like to develop a latent growth model (LGM) with Stata. The point is to illustrate estimated effects of predictors by using Stata...
  • Nvidia Organizational Structure: functional and hybrid
    Nvidia is 7th largest company in the world with a market cap of USD 1 trillion. Due to the size and scope of its operations, it is difficult...
  • Getting values from second to last loop of a -while- loop
    Hi fellow Statalisters, I am using a -while- loop for a particular application, where I need to retrieve a particular value from the secon...
  • Using weights with xtheckman | xtheckman's fixed effects equivalent
    Hi, I am using six waves of the PSID to estimate several determinants (particularly wealth) of the wage equation and the selection equatio...

Recomended Articles

Powered by Blogger.

About Me

Mtenga Baltazar
View my complete profile

Blog Archive

  • ►  2024 (6)
    • ►  February (6)
  • ►  2023 (877)
    • ►  November (1)
    • ►  October (9)
    • ►  September (14)
    • ►  July (9)
    • ►  June (15)
    • ►  May (133)
    • ►  April (174)
    • ►  March (176)
    • ►  February (157)
    • ►  January (189)
  • ►  2022 (2201)
    • ►  December (181)
    • ►  November (180)
    • ►  October (198)
    • ►  September (182)
    • ►  August (182)
    • ►  July (194)
    • ►  June (174)
    • ►  May (167)
    • ►  April (181)
    • ►  March (186)
    • ►  February (170)
    • ►  January (206)
  • ►  2021 (7379)
    • ►  December (327)
    • ►  November (645)
    • ►  October (646)
    • ►  September (639)
    • ►  August (557)
    • ►  July (649)
    • ►  June (656)
    • ►  May (697)
    • ►  April (683)
    • ►  March (697)
    • ►  February (518)
    • ►  January (665)
  • ►  2020 (7956)
    • ►  December (653)
    • ►  November (659)
    • ►  October (598)
    • ►  September (654)
    • ►  August (660)
    • ►  July (682)
    • ►  June (683)
    • ►  May (708)
    • ►  April (692)
    • ►  March (698)
    • ►  February (638)
    • ►  January (631)
  • ►  2019 (9458)
    • ►  December (601)
    • ►  November (643)
    • ►  October (650)
    • ►  September (637)
    • ►  August (645)
    • ►  July (681)
    • ►  June (654)
    • ►  May (1034)
    • ►  April (1079)
    • ►  March (1122)
    • ►  February (876)
    • ►  January (836)
  • ▼  2018 (931)
    • ►  December (692)
    • ▼  November (239)
      • What stats are appropriate to assess model fit for...
      • How do I combine observations within a dataset?
      • Difference between catplot and tabplot
      • I created a YouTube video on using CODE delimiters...
      • Predicting residuals of an EGARCH model for panel ...
      • Workshop on interpreting intetraction effects
      • threshold, gaps not allowed
      • 2019 German Users Group Meeting
      • Finding a mean when values are repeated
      • does an independent variable predict dependent var...
      • Optimize() on a segment
      • ICC in mi estimate meqrlogit
      • fix effect and clustering residuals
      • 3SLS with non-continuous endogenous variables
      • Interpretation of Interaction terms
      • Sts graph truncate
      • regression of the panel data: dependent variable a...
      • help me whit stata command
      • Standardised independent variables using logistic ...
      • Rescaling
      • the exponential model, using the NLS, poisson and ...
      • Sampling using sample command
      • Incidence rate
      • Inquire about uniform random-number generation
      • Returns to education regression
      • URGENT help needed with university data analysis c...
      • How to analyze intergroup interaction in subgroup ...
      • Heckman model
      • statistical significance
      • How to test correlation between two variables – Pa...
      • xtoprobit vs xtreg, fe
      • Add Confidence intervals to median spline
      • Using maps to present incidence rates
      • Test: latex
      • Hausman test
      • Use e(selected0) of Lasso Regression in another re...
      • Extract Year from Date (11985 - 122018)
      • Inconsistency of data in national survey
      • Generating data to balance a panel dataset
      • Getting different results from running same exact ...
      • Running Diebold Mariano test using panel data.
      • Latent class and standard erros
      • hybrid model pseudo-panel.
      • Dynamic panel data model with xtabond2/ivreg2/Diff...
      • How to create a time dimension in one cross-sectio...
      • why I would have different number of cases between...
      • Problem of handling missing data
      • Estpost summarize yields wrong number of observations
      • subset of local marco
      • Creating a string variable with multiple different...
      • Logit Regression
      • Initial period variables
      • Drop before calculating a mean
      • Mata matrix to variables using st_store
      • Propensity Score Matching with multiple and contin...
      • Help with SEM in Stata
      • Panel data analysis using fixed effects models
      • Help with manually calculating marginal effects at...
      • Help with manually calculating marginal effects at...
      • Logistic regression with few clusters (Boottest pa...
      • Create country dummies and time count variable – P...
      • Loop over multiple observations in one variable
      • Appending several datasets for selected variables ...
      • logistic regression for categorical variables
      • LCA(Latent Class Analysis) still "not concave" and...
      • r(430) cannot compute an improvement -- discontinu...
      • Lopping and storing beta coeffecients after regres...
      • foreach- reorganising multiple variables
      • How to draw a correlation forest map with the adme...
      • Using atcontrasts in margins for a mixed effect model
      • GLM or Tobit Regression & Forecast for different d...
      • Unbalanced panel data analysis
      • Interactions, Inconsistent resutls
      • Implementing Wild Bootstrap T Standard Errors in R...
      • GLM model with Gamma distribution and log link - r...
      • Comparing the regression Coefficients in a Fama-Ma...
      • Counting values in long dataset
      • Fitting the basic AIDS model using nlsur
      • Web scraping / string parsing help
      • Error updating somersd; perhaps due to general upd...
      • Problems with spmap
      • count the number of distinct observations across v...
      • Graph
      • Rounding, multiple decimals off and Locals
      • fracreg
      • Selecting a subset of a large dataset
      • Compounding Panel Data
      • Interpreting the intercept in a logistic regressio...
      • Mixed effects (multilevel) model vs. cluster command
      • Creating Variable based on NAIC Digit Level match ...
      • Testing the OLS assumptions in relation to standar...
      • Help with standard deviations of oaxaca command
      • Compute covariance and store in column
      • Problem with similar equation (gen)
      • Staggered difference in difference
      • Creating a list of most common households in a cen...
      • 2x2 table and generating p-value for Chi-squared t...
      • Creating a list of most common households in a cen...
      • Admetan: edit graph
      • Scalar operation returns inadvertent result

© BJ Data Tech Solution | Theme by Rifki.id | Premium Blogger Templates | PBT | Powered by Blogger |-| About | Privacy Policy | Sitemap | Contact | Disclaimer