Please, are there any necessary preliminary tests for the Panel GMM estimator technique?

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Can you align mRNA to a whole genome sequence of an organism, to check for sequence variations?

I'm carrying out a gene expression study (mRNA seq) of a gene, I noticed the BLAST results of the gene from species with same family had higher variations, but on aligning to the reference...

11 September 2022 7,142 5 View

How to ascertain the amount of lactic acid produced in a fermentation medium using values obtained from Spectrophotometer?

I want to know the amount of lactic acid produced in a fermentation medium using spectrophotometer.

13 March 2022 6,899 3 View

What are the types of flood early warning systems exist globally?

I intend to know types of flood early warning systems exist in the globe. However, one may even share the types that exist in certain area.

16 January 2022 1,663 2 View

Reduce order model?

Good evening please I need help, I am working on the reduction of hygrothermal models using proper generalized decomposition. I would like to have a document that explains this method

02 January 2022 275 2 View

Can I restart a PCR process in progress?

I started a PCR process and recall I didn't include the Primers of the gene of interest in the cocktail preparation process. The pcr was at the initial denaturing step (@1:00), Will my reaction be...

09 June 2021 1,151 7 View

Could anyone you please help me with the sequences of the anti-Rotavirus Group A VP6 monoclonal antibody?

The anti-Rotavirus Group A VP6 monoclonal antibody is the antibody against the group specific antigen of Group A Rotaviruses

25 March 2021 6,710 0 View

What can I use in place of calcium carbonate in preparation of a selective medium for carbonic anhydrase producing bacteria?

Screening for carbonic anhydrase producing bacteria and I couldn't get calcium carbonate. Is there and salt I can use in place of it?

03 July 2019 7,889 0 View

What can I use to enrich my media if am screening for urease producing microorganisms?

I got a soil sample and I want to screen for urease producing bacteria, what can I add to the medium in other to enhance the urease producing bacteria?

03 July 2019 9,997 4 View

Please, can someone explain the null hypothesis for Hausman test? And What does it really mean when the Hausman test gives a significant probability?

Hi, Please, can someone explain the null hypothesis for Hausman test? And What does it really mean when the Hausman test gives a significant probability? and how does it relate to firm and...

10 January 2019 5,730 2 View

Partial gene coding sequence translation

I sequenced a partial coding sequence (didn't run RACE) of a gene which got 800bp and the reference sequence got 1330bp. I have used bioinformatic tools such : Bioedit, Expasy, and ncbi orf...

01 January 1970 4,525 4 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