What are the tests post estimation by Dynamic Panel GMM in STATA?

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Why Powder XRD is performed after cruhsing a crystal if Single Crystal XRD analysis of the same crystal has been performed already ?

What information we can get from PXRD analysis other than from SCXRD analysis of a crystal ?

30 July 2024 6,261 4 View

"What is the best method and model for evaluating the mechanical and viscoelastic properties of a viscous material with multiple particle inclusions?

"What is the most accurate method and model for evaluating the effective mechanical and viscoelastic properties due to the inclusion of multiple types of particles in a viscous material, and which...

16 June 2024 550 0 View

"What is the best method and model for evaluating the mechanical and viscoelastic properties of a viscous material with multiple particle inclusions?

"What is the most accurate method and model for evaluating the effective mechanical and viscoelastic properties due to the inclusion of multiple types of particles in a viscous material, and which...

16 June 2024 9,139 1 View

Best way to electropolish a Cemented Carbide after mechanical polishing?

I am trying to polish Cemented carbide sample for EBSD analysis. I have done the mechanical grinding and polishing up to 1/4um Dimond paste. At this level still I can see mechanical distortion....

07 May 2024 5,883 0 View

Is there a formula that I can use to calculate the power output using solar irradiance values?

01 May 2024 8,233 3 View

Is it possible not to find D- and G-bands in Raman spectra of GO annealed in inert environment at high temperatures?

XRD has denoted its conversion into rGO but not finding its characteristic peaks (but only 2D band) in Raman is very confusing. Please suggest me something with references.

31 March 2024 2,362 3 View

Can I use a random dataset? Currently, no desired dataset is available for load balancing in nodes. can I use a random dataset?

Anyone please explain this

14 March 2024 6,976 2 View

Does anyone know if there is sgRNA library designed for MDCK cell line?

I am interested in knowing if there is any sgRNA library designed against MDCK cell line which is a canine cell line. i believe it shares about 84% homology with human cell line. let me know if...

03 January 2024 5,148 0 View

How to provide charges to atoms in a PBC structure in DFT?

In articles, researchers discuss about the charged ions in PBC structures using first principles investigation. How can we possibly provide charge to an atom in DFT during PBC investigation? e.g....

23 December 2023 1,380 3 View

What are the parameters that affect the optical band gap of a composite material?

Can crystallinity, morphology, molecular packing, phase separation, and nanoscale morphology be those parameters? If yes, how?

20 November 2023 246 1 View

Bimodal Distribution, Split or Transform for ANOVA?

Hi, I have some experiments where different nutrients/fertilisers (including but not limited to N) were applied to plants. Unsurprisingly the data produced is bimodal. The populations are...

18 July 2024 7,305 1 View

Why do most people use GMM in analysis that focus on Africa?

I want to understand why most analyses conducted in Africa use GMM instead of other panel data estimation techniques.

16 April 2024 5,322 3 View

How could we implement -xthenreg (GMM threshold) with robust errors (Stata14)?

Could you please clarify how to add robust (white) errors to the function -xthenreg in Stata14? I am running Threshold GMM Estimator (Seo and Shin (2016)) for my panel (N=60, T=28). Commands such...

03 April 2024 8,500 1 View

How can we write the system GMM model (mathematical equation)?

20 March 2024 5,609 1 View

How to Interpret Validity of GMM Model Specification - Valid at Subsample Levels?

I am currently conducting research on the influence of budget revisions on budget absorption in government units. The estimation method I am using is the system GMM, with approximately 15,000...

19 March 2024 5,579 0 View

Can, please, someone share step wise procedure to run GMM, first difference GMM, two step difference GMM and two stage GMM on Panel data IN STATA?

Also, how we can understand we have to for GMM model for our data? why do we go for different GMM models when there are random and fixed effect methods that can be decided by the Hausman test and...

09 January 2024 4,622 4 View

Steps for running GMM during Analysis?

Help is requested.

17 October 2023 9,632 0 View

What to do if you can't perform the AR(2) Arellano-Bond test in system GMM because of insufficient time periods (T=3)?

I am estimating a system GMM model with N=5000 and T=4. One time period is lost due to the dependent lagged variable, and so, in practice, T=3. The Arellano-Bond test for serial correlation needs...

13 October 2023 9,046 0 View

Le fait de ne pas rejeter le test d'Arellano-Bond pour AR(1) impactent les estimations ?

. xtabond2 IndicedeTheil PIBparhabitantUSconstants InflationdéflateurduPIBa ITC Créditintérieurfourniausecte, gmm( IndicedeThei > l, lag(2 4)collapse) iv( PIBparhabitantUSconstants...

23 August 2023 5,900 1 View

Large N and large T panel analysis, which method to use ?

Hello, I am using panel data with N= 37 (countries) and T= 31 (1990 to 2020). After reading about literature of dynamic panel methods, I found that when T is small and N is large, it's better to...

04 August 2023 8,529 2 View