Turnbull - returning invalid name r(198) code

[Kehinde Ojo]

I am running a Turnbull on a Contingent Valuation Survey Response to estimate willingness to pay.

turnbull Bid1 Response1
1 invalid name
r(198);


Below are the first six rows in my data
Bid1 Respon~1 |
|-----------------|
1. | 80 1 |
2. | 20 1 |
3. | 160 0 |
4. | 40 0 |
5. | 20 0 |
|-----------------|
6. | 160 1

Bid1 is the bid amount, while Response1 is binary 1 or 0 (the response to the bid amount).

I saw a thread with a similar question in the forum, and someone suggested adding 100 observations with a bid equal to 0 and a response equal to 1, which I did, but it returned some error message afterward.

I would appreciate any suggestions on how I can solve this issue.

local 02_Full_launch_clean_data = _N + 100

. set obs `02_Full_launch_clean_data'
replace Bid1 = 0 if Bid1 ==.
replace Response1 = 1 if Response1 ==.

| Turnbull Estimates
Bid | Nj Tj Fj Nj* Tj* Fj* fj* Elb V(Elb) Eub
----------+-------------------------------------------------------------------------------------------------------------
0p | 0.000 0.000 0.000 4.316
20 | 71.000 329.000 0.216 71.000 329.000 0.216 0.216 0.547 0.206 1.094
40 | 80.000 329.000 0.243 80.000 329.000 0.243 0.027 4.875 0.224 9.750
80 | 119.000 326.000 0.365 119.000 326.000 0.365 0.122 6.676 1.138 13.353
160 | 148.000 330.000 0.448 148.000 330.000 0.448 0.083 88.242 4.797 264.727
480 | 1.000 1.000 0.552
Total | 418.000 1,414.000 418.000 1,414.000 100.341 6.364 293.240
------------------------------------------------------------------------------------------------------------------------
Note: (p) pooled category. Last bid value was arbitrarily chosen. Pval(Elb) = 0.00000.



tipo not unique within _v1;
there are multiple observations at the same tipo within _v1.
Type "reshape error" for a listing of the problem observations.
r(9);