OECD (Gross savings, 1968-1996. N = 24, T = 29, NT = 696)

No. of Factors

Confidence interval

$\widehat{a}$

${\widehat{z}}_0$

Sample estimate

1

(0.487674, 0.836918)

0.0223135

−0.190820

0.735557

2

(0.497660, 0.855701)

−0.023135

−0.197632

0.764558

3

(0.524156, 0.867715)

−0.054166

−0.210428

0.793041

4

(0.649917, 0.889942)

−0.014458

−0.243868

0.825500

5

(0.813059, 0.947233)

−0.013709

−0.209574

0.912026

6

(0.802923, 0.958991)

−0.021348

−0.145900

0.915744

7

(0.870519, 0.971347)

0.007386

−0.198484

0.943478

8

(0.919439, 0.984931)

0.002718

−0.132402

0.966385

9

(0.995651, 0.999111)

0.051234

−0.130716

0.997990

10

(0.999562, 0.999917)

0.085339

−0.001671

0.999787

OECD (Gross savings, 1997-2015. N = 29, T = 19, NT = 551)

No. of Factors

Confidence interval

$\widehat{a}$

${\widehat{z}}_0$

Sample estimate

1

(−0.259412, 0.458893)

−0.017424

−0.009191

0.101994

2

(−0.306010, 0.300288)

0.019612

−0.007520

−0.027297

3

(−0.091515, 0.415701)

−7.13 × 10⁻⁵

−0.037608

0.169423

4

(−0.111353, 0.444279)

0.036939

0.011698

0.138652

5

(−0.255661, 0.413717)

0.050647

0.088684

−0.013639

6

(−0.191098, 0.268788)

0.002828

0.06773

0.71018

7

(−0.163225, 0.327422)

0.022533

0.024233

0.091152

8

(−0.546867, 0.189548)

−0.021184

0.021726

−0.204631

9

(−0.557895, 0.185754)

−0.027370

0.036772

−0.213753

10

(−0.719348, −0.154828)

−0.069142

0.0000

−0.459650