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Research and development expenses (Tables)
12 Months Ended
Dec. 31, 2022
Research and development expenses  
Schedule of research and development expenses

Year Ended

December 31,

(in thousands of $)

    

2022

    

2021

    

2020

Personnel expenses

 

$

162,010

 

$

160,464

 

$

86,036

External research and development expenses

 

366,955

 

382,902

 

259,943

Materials and consumables

 

2,396

 

2,735

 

3,562

Depreciation and amortization

 

102,132

 

3,742

 

2,835

Other expenses

 

29,872

 

30,677

 

18,509

Total research and development expenses

 

$

663,366

 

$

580,520

 

$

370,885