### Number of rows and interpretation of efficiency measures

Posted:

**Mon Dec 16, 2019 10:49 pm**Hi

I am doing an unlabelled d-efficient design, with 6 attributes (3 continuous, 3 categorical) see code below.

1) Is there a way to check if the number of rows I'm using is appropriate?

https://drive.google.com/file/d/1ZHt6VcvfuuRO4VzByGXo3RSeG75ZN4Lq/view?usp=sharing

2) I've attached my MNL efficiency measures output, i'm struggling to interpret if the D-error, A-error and S-estimate is within the acceptable range? is there a rule of thumb for these efficiency measures?

Thanks a lot in advance!

Tara

I am doing an unlabelled d-efficient design, with 6 attributes (3 continuous, 3 categorical) see code below.

- Code: Select all
`Design`

;alts = alt1*, alt2*

;rows = 12

;eff = (mnl,d)

; model:

u(alt1)= b1[0.00001]*effect[30,50,70]+b2[-0.0001]*speed[6,10,14]+ b3[-0.0001]*flare [10,40,60]+b4.dummy[0|0]*route [0,1,2]+b5.dummy[0|0]*moderate[0,1,2]+b6.dummy[0]*severe[0,1] /

u(alt2) = b1*effect+b2* speed+ b3*flare +b4.dummy*route +b5.dummy*moderate+b6.dummy*severe

$

1) Is there a way to check if the number of rows I'm using is appropriate?

https://drive.google.com/file/d/1ZHt6VcvfuuRO4VzByGXo3RSeG75ZN4Lq/view?usp=sharing

2) I've attached my MNL efficiency measures output, i'm struggling to interpret if the D-error, A-error and S-estimate is within the acceptable range? is there a rule of thumb for these efficiency measures?

Thanks a lot in advance!

Tara