1. Firm Dynamics and Job Creation: Gazelles – Born or Made? Mary Hallward-Driemeier World Bank Preliminary, Not for Citation

2. Who Creates Jobs: Size or Age? Haltiwanger, Jarmin and Miranda (2010) focuses on age rather than size as a key determinant of JC Hsieh and Klenow (2012) show the dynamics are different in developing countries, with greater frictions to reallocation as part of the explanation. Sutton (2010) looks at the largest Ethiopian manufacturing firms – less than 5% started small. Similar results hold in Ghana. Is there a missing middle? Across developing countries, are gazelles born or made?

3. Simple Answer: Entry Especially of large firms After entry, net job creation is much smaller. With some evidence that larger firms add more jobs over time. And cumulative effects can be significant.

4. While few large firms enter, they are large enough to create most jobs

5. Large firms’ contributions to JC after entry vary across countries In Morocco, large firms’ JC is relatively lower – although all size classes grow more on average than in Chile. Large outliers play a bigger in Chile

6. Defining “Age”: Entry or Theshold? Chile has L>=10 threshold; Morocco does not Chile does not ask for age; Morocco does

7. But large firms destroy jobs too More micro firms exit – but destroy fewer jobs Share of exiting firms by size are smooth across age

8. Critical to include job destruction – particularly from exit

9. JC is concentrated in the early years – particularly for the large

10. Age and size explain creation beyond birth

11. More action remains in initially- larger firms in Chile too

12. For destruction as well as creation

13. Cohort vs Time Effects

14. Over time, JC (and JD) is in older, larger firms Chile

15. Growth is usually not sustained – or related to initial size after 2-3 years.

16. So large tend to stay large – and only a few join their ranks (Morocco)

17. Pattern is similar in Chile

18. Transitions among larger population also show limited mobility Looking at whole age distribution, transition rates are lower among older firms, reinforcing that large firms come from firms that were already large

19. Productivity by Age and Size of Entry Chile Larger firms are more productive; with greater variance too Limited improvements over time; limited evidence of rapid ‘learning’ upon entry

20. Are large firms born or made? Greatest job creation is at entry Greatest annual growth is in first 2-5 years – Rates of growth are not that correlated with initial size or with initial and subsequent growth Transitions across growth classes are only very marginally more likely over time Most large firms are born that way; of existing large firms 80-85% were large at entry. But: – Within 10 years, 45-65% will have exited – Large initial size does not reduce survival probabilities significantly (although some effect in Chile) – Work in progress indicates initial productivity is limited predictor of survival; link becomes stronger especially for larger firms – Formerly large firms that downsize, disproportionately exit in subsequent years and few return to the highest size levels