8. Administrative expenses
Administrative expenses comprise the following:
| 
       in CHF 1 000  | 
    
       
  | 
    
       2022  | 
    
       
  | 
    
       2021  | 
  
| 
       Investment manager  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       – Management fees (incl. VAT)  | 
    
       
  | 
    
       36 497  | 
    
       
  | 
    
       50 681  | 
  
| 
       Personnel  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       – Board of Directors remuneration  | 
    
       
  | 
    
       1 550  | 
    
       
  | 
    
       1 288  | 
  
| 
       – Wages and salaries  | 
    
       
  | 
    
       578  | 
    
       
  | 
    
       525  | 
  
| 
       – Social insurance contributions and duties  | 
    
       
  | 
    
       122  | 
    
       
  | 
    
       101  | 
  
| 
       
  | 
    
       
  | 
    
       38 747  | 
    
       
  | 
    
       52 595  | 
  
The remuneration model of BB Biotech AG is determined by the Board of Directors.
Since 2014, the remuneration paid to the investment manager is based upon a 1.1% p.a. all-in fee on the average market capitalization without any additional fixed or performance-based elements of compensation, which is paid on a monthly basis. The compensation of the Board of Directors consists since 2014 of a fixed compensation.