(in thousands) 2000 1999 1998
Cash flows from operating activities:
  Net income   $ 179,467   $ 143,217   $ 126,497
  Adjustments to reconcile net income to net cash provided by operating activities:
    Depreciation and amortization 128,542 140,349 111,022
    Minority interest 16,149 17,415 16,076
    Gain on sale of assets and other provisions, net (36,371 ) (54,822 ) (38,160 )
    Equity in earnings of unconsolidated entities (7,596 ) (5,167 ) (5,282 )
    Income and gain on sale of discontinued operations (32,308 )
    Stock and units issued in connection with compensation plans 2,890 2,356 312
    Other (2,686 ) 1,825 685
  Changes in assets and liabilities:
    Increase in accounts and notes receivable (30,612 ) (10,736 ) (6,605 )
    Increase in accrued straight-line rents (9,187 ) (14,331 ) (13,919 )
    Additions to tenant leasing costs (17,050 ) (13,049 ) (12,949 )
    (Increase) decrease in prepaid expenses and other assets (4,332 ) (23,728 ) 7,453
    (Decrease) increase in accounts payable and accrued expenses (15,796 ) (16,027 ) 37,066
    Increase in rent received in advance and security deposits 2,426 7,700 17,556
      Total adjustments (5,931 ) 31,785 113,255
      Net cash provided by operating activities 173,536 175,002 239,752
Cash flows from investing activities:
  Acquisition and development of rental property (90,475 ) (78,957 ) (337,080 )
  Acquisition and development of executive suite assets (6,678 ) (83,709 ) (217,439 )
  Additions to land held for development or sale (26,157 ) (3,149 ) (132,416 )
  Additions to construction in progress (97,025 ) (275,942 ) (400,391 )
  Distributions from unconsolidated entities 7,392 19,424 5,852
  Contributions to unconsolidated entities (29,942 ) (5,191 ) (82,120 )
  Acquisition of minority interest (8,438 ) (2,231 )
  Increase (decrease) in restricted deposits (27,007 ) 25,586 (15,802 )
  Proceeds from sales of properties 474,015 487,883 194,075
  Proceeds from sale of discontinued operations 377,310
      Net cash provided by (used by) investing activities 572,995 83,714 (985,321 )
Cash flows from financing activities:
  Net proceeds from sales of common and preferred stock 296,518
  Repurchase of common stock (90,223 ) (109,802 )
  Exercises of stock options 29,730
  Net (repayments) borrowings on unsecured credit facility (including
   $140,500 related to discontinued operations in 2000) (307,500 ) 1,000 323,000
  Proceeds from issuance of senior unsecured notes 350,000
  Payment of senior unsecured notes (150,000 )
  Repayments of mortgages payable (including $14,449 related to
   discontinued operations in 2000) (88,811 ) (13,468 ) (25,412 )
  Proceeds from refinancing of existing mortgages 51,980
  Dividends and distributions to minority interests (169,320 ) (172,626 ) (173,147 )
  Deferred financing costs (1,516 ) (16,821 )
  Contributions from minority interests 2,411 6,066 3,622
      Net cash (used by) provided by financing activities (773,713 ) (238,366 ) 757,760
      Foreign currency translation adjustment (1,517 ) 463
      (Decrease) increase in unrestricted cash and cash equivalents (27,182 ) 18,833 12,654
Unrestricted cash and cash equivalents, beginning of the period 51,886 36,499 23,845
Unrestricted cash and cash equivalents, end of the period $ 24,704 $ 55,332 $ 36,499
Supplemental disclosure of cash flow information:
    Cash paid for interest (net of capitalized interest of $12,367, $26,485
     and $30,482, respectively) $ 99,628 $ 95,221 $ 81,428

Supplemental disclosure of noncash investing and financing activities
(a)  During 1998, we funded a portion of the purchase price of property acquisitions by assuming $31.6 million of debt and liabilities and by issuing $10.0 million of unit options.
(b)  During 2000, we contributed $332.1 million of assets to an unconsolidated joint venture.

See accompanying notes to consolidated financial statements.