Hi everyone,
I am having an issue with the command tfdiff.
My data is more or less as follow:
My code is the following:
And this is the result I get:
I have absolutely no clue how to fix this error message (1.w#1._D10 not found r(111); ). Would anyone have an idea?
Thanks a lot,
Pierre
I am having an issue with the command tfdiff.
My data is more or less as follow:
| number1 | w | wmb_yieldtomat_w | home_bias | price_change |
| 9.546813 | 0 | . | 1 | . |
| 9.546813 | 1 | 2.890384 | 1 | -.0039215 |
| 15.75315 | 0 | . | 1 | -.0248645 |
| 15.72894 | 1 | 2.890384 | 0 | -.0172681 |
| 15.73642 | . | 3.491256 | 0 | .0081633 |
Code:
tfdiff number1 w wmb_yieldtomat_w home_bias price_change, model(fe) pvar(id3_n) tvar(yearq) t(205) test_pt graph ci(10) vce(r) datatype(panel) save_graph(second) save_results(secondresults)
Code:
***********************************************************
Data type: PANEL
***********************************************************
***********************************************************
Model type: Fixed-effect
***********************************************************
panel variable: id3_n (unbalanced)
time variable: yearq, 2010q3 to 2012q4, but with gaps
delta: 1 quarter
note: 1.w omitted because of collinearity
note: home_bias omitted because of collinearity
Fixed-effects (within) regression Number of obs = 3,862
Group variable: id3_n Number of groups = 584
R-sq: Obs per group:
within = 0.0705 min = 1
between = 0.0117 avg = 6.6
overall = 0.0001 max = 9
F(18,583) = 20.62
corr(u_i, Xb) = -0.0414 Prob > F = 0.0000
(Std. Err. adjusted for 584 clusters in id3_n)
----------------------------------------------------------------------------------
| Robust
number1 | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-----------------+----------------------------------------------------------------
1._D2 | -.038436 .0354251 -1.08 0.278 -.1080123 .0311404
1._D3 | -.0440267 .0330545 -1.33 0.183 -.1089471 .0208936
1._D4 | -.0691565 .0516174 -1.34 0.181 -.1705352 .0322222
1._D5 | .059172 .0502553 1.18 0.240 -.0395314 .1578755
1._D6 | .0642306 .05753 1.12 0.265 -.0487607 .1772218
1._D7 | .1600005 .0826168 1.94 0.053 -.0022624 .3222633
1._D8 | .0763025 .0636309 1.20 0.231 -.0486712 .2012762
1._D9 | .1013734 .1106962 0.92 0.360 -.1160386 .3187854
|
w#_D2 |
1 1 | .064431 .04028 1.60 0.110 -.0146806 .1435427
|
w#_D3 |
1 1 | .0501389 .0424865 1.18 0.238 -.0333064 .1335842
|
w#_D4 |
1 1 | .0894614 .0665832 1.34 0.180 -.0413107 .2202336
|
w#_D5 |
1 1 | -.0189698 .0674356 -0.28 0.779 -.151416 .1134764
|
w#_D6 |
1 1 | -.0301453 .0747931 -0.40 0.687 -.1770421 .1167515
|
w#_D7 |
1 1 | -.094693 .0910507 -1.04 0.299 -.2735204 .0841344
|
w#_D8 |
1 1 | -.0068193 .0814428 -0.08 0.933 -.1667764 .1531378
|
w#_D9 |
1 1 | -.0342146 .1106269 -0.31 0.757 -.2514905 .1830613
|
wmb_yieldtomat_w | .0102767 .0232727 0.44 0.659 -.0354317 .0559852
|
price_change | -1.136883 .0986639 -11.52 0.000 -1.330663 -.9431027
_cons | 15.51641 .0873608 177.61 0.000 15.34483 15.68799
-----------------+----------------------------------------------------------------
sigma_u | 2.5591567
sigma_e | .4783128
rho | .96624655 (fraction of variance due to u_i)
----------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
******************************************************************************
**************** TEST FOR 'PARALLEL TREND' ***********************************
******************************************************************************
Null to be tested:
_b[1.w]=_b[1.w#1._D2]=0
( 1) 1o.w - 1.w#1._D2 = 0
( 2) 1o.w = 0
Constraint 2 dropped
F( 1, 583) = 2.56
Prob > F = 0.1102
RESULT: 'Parallel-trend' passed
******************************************************************************
1.w#1._D10 not found
r(111);
Thanks a lot,
Pierre
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