Who are some leading experts on nonprofit organizations and tax filing?

Hi there! I'm looking for someone who can help me better understand nonprofits and how they file their taxes. It's for an ongoing research. Preferably someone who is nationally known on this topic...

05 June 2019 4,078 3 View

Does asking "Did you have any problems?" versus "What problems did you have?" get you more and better responses?

My context is survey question development and usability testing. We'll have participants answers some questions or do a task and then debrief them to find out what issues they had. Some colleagues...

07 August 2018 9,149 2 View

What are some good publishers for social science research methodology text books?

I'm looking for opinions based on experiences here. I know (generally) the range of publishers for social science and stats books, and have used intro methods and stats books from a range of...

11 December 2015 918 7 View

What are acceptable/common agreement rates or kappas for industry and occupation (I&O) codes?

There is a more detailed post on this project...

04 May 2015 9,732 2 View

What are the major (and minor) surveys that interview teens?

Greetings, I'm survey methodologist for the California Health Interview Survey (CHIS) and I'm working on a research project on obtaining parental permission for our teen interview. As part of that...

04 May 2015 9,704 7 View

Has anyone seen (or calculated themselves) performance benchmarks between Stata and SAS?

I have a good sense of how Stata and SAS differ in how they handle data files (with SAS reading only one observation into memory at a time and being able to handle multiple files at one, and Stata...

01 February 2015 3,874 8 View

How do everyday people think about their "public program participation" (e.g., foodstamps, Medicaid)?

In survey research we often do extensive cognitive pretesting and focus groups to understand how respondents think, in their everyday lives, about the complex and formal ideas and topics we want...

01 February 2015 2,365 8 View

Within-household interviews: Better to ask for more upfront or later?

For my survey and decision science friends...Do you think it's better to ask for multiple interviews in the household upfront (e.g., after the screener) or to wait until later (e.g., after the...

31 December 2014 4,447 4 View

What are the proper techniques for analyzing reliability of categorical variables with a large number of categories?

31 December 2014 8,112 9 View

What are your favorite contemporary papers on multilevel binary and multinomial logistic regression with survey weighted data?

31 December 2014 9,811 4 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View