How I can cluster statistically bird species that prefer using different layers of the forest trees ?

In the forest birds are using different layers of forest trees from the soil to the canopy. Some birds such as iberian chiffchaffs are using the soil ground to set their nests while other species...

18 July 2020 2,639 1 View

How biological material (Animal carcasses, excrements) collected in field can be best stored for a later DNA and RNA extraction?

How biological materials (Animal carcasses, excrements) collected in field can be best stored for a later DNA and RNA extraction? what is the protocol to follwo and what are the storing...

25 April 2020 5,726 11 View

How to disperse Al nano particles in a solvent?

Dear all, At first, I would like to thank you for looking for this question. I am currently looking for a solution that I can disperse aluminum nanoparticles(has a natural oxide layer) in a...

29 August 2017 8,940 8 View

How to remove natural boron oxide layer of boron nanoparticles?

20 March 2017 5,001 5 View

APTES coated to aluminum surface?

02 June 2016 8,757 5 View

Is there any good online workshop on advanced DEA models?

OR ANY study material with step by step analysis & its interpretation using the software?

01 January 2021 993 1 View

How to calculate linear optimisation after DEA in Stata?

In Stata, command 'dea' reports efficiency scores but no weights used to value each input. Is it possible to run dea in mata environment and then export the weights of input instead? Or is there...

11 October 2020 7,579 2 View

What should be the measure of effect size for meta-analysis of efficiency-based studies?

I am planning to conduct a meta-analysis on the efficiency of MFIs from existing literature, restricted to DEA/ SFA based studies. However, most DEA/ SFA based meta-analyses (Thiam and Bravo-Ureta...

30 July 2020 4,534 1 View

Which inputs and outputs should I add on my DEA Analysis?

I'm doing research on the performance efficiency of different oil companies in the world. It has come to my attention that many scholars use DEA Analysis to measure it. However, it is not clear...

23 June 2020 3,223 9 View

How to get DEA Solver v.15?

My sample consists of data of 56 data with 10-year data taken annually (total 560 observations). Is it possible to run DEWA with this data for the efficiency test or we have to run DEA for the...

27 April 2020 6,703 2 View

How can I extract input / output contributions for a DEA model in R?

I have an example from Frontier Analyst (attached screenshot), but I cannot find out, how to extract the same data in R (currently, I am using rDEA and Benchmarking packages).

01 February 2020 4,819 1 View

What is the best post DEA methodology to analyse efficiency variations among different firms of a particular industry?

I want to know which methodology I should use to explain variation in efficiency scores calculated among firms using Malmquist productivity index. Also, to know what are the best explanatory...

31 January 2020 937 1 View

Simar and Wilson or Fractional regression in the second stage of DEA?

The question is in the title. Could you give me resons for using one of them in my second stage DEA analysis?

31 December 2019 9,787 3 View

Fractional regression or Double-Bootstrapped Truncated Regression in the second stage of DEA?

Dear all, I used those two types of regression to estimate effects of environment factors on hospital efficiency. However, they gave me opposite results. For instance, in FR percentage of people...

10 November 2019 5,416 3 View

Bootstraping DEA scores and SE?

Dear all, I try to do a research based of DEA using bootsraping techniques in R packages: Bootstraping and DEAr. Does someone know how to calculate SE with 95%CI and how to obraine summaried...

24 October 2019 6,353 3 View