The SASEXCCM Interface Engine

Missing Values

In general, CRSP missing values are represented as ‘.’ in the SAS data set. When accessing the CCM database, the SASEXCCM engine interprets missing values according to the conditions and codes defined by Compustat and represents them as SAS missing codes, as shown in Table 40.3.

Table 40.3: Mapping of Compustat and SAS Missing Codes

Missing Value

Missing Code

Condition

0.0001

.

No data for data item

0.0002

.S

Data are available only on a semi-annual basis

0.0003

.A

Data are available only on an annual basis

0.0004

.C

Combined into other item

0.0007

.N

Data are not meaningful

0.0008

.I

Reported as insignificant


Missing value codes conform with Compustat’s Strategic Insight and binary conventions for missing values. For more information about how CRSP handles Compustat missing codes, see the section Notes on Missing Values in the second chapter of the CRSP/Compustat Merged Database Guide.